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In September 2019, more than 300 representatives of farmers’ organizations, trade union federations, indigenous people's organizations, fisher groups, women's organizations, environmental groups, and a few progressive political parties from Bangladesh, Nepal, Sri Lanka, and various parts of India met in Hyderabad. This four-day-long convention concluded with the founding of the South Asian People's Action on Climate Crisis (SAPACC). The delegates voiced their concerns about the anticipated effects of the impending climate crisis and ‘critiqued the inadequacy of governments’ policies’ (Adve 2019). In the past, India's climate activists focused almost exclusively on multinational corporations and the governments of industrialized countries, who are responsible for causing the climate crisis. They argued that questioning the Indian government would ‘dilute’ the demand for holding industrialized countries accountable. Therefore, the SAPACC's public critiques of India and other countries in South Asia marks an important shift in the evolution of climate movements in the region.
Social movements and civil society organizations work within the complex politico-economic and institutional context of India. On the one hand, the Constitution of India is regarded as highly progressive, affording citizens a variety of civil and political rights and freedoms and a scaffolding of democratic institutions that are functional to some extent. This context is particularly conducive for the functioning of civil society institutions that focus on relatively less controversial and apolitical questions, for example, Gandhian organizations dedicated to the ‘welfare’ of the poor, or those promoting tree-planting programmes. On the other hand, organizations advocating for the rights and entitlement of the poor, and those demanding effective enforcement of constitutional provisions and a welfare state, often confront a state that is extremely opaque and highly vindictive (Banerjee 2008). This ‘Janus-faced nature of the postcolonial state’ explains why some types of environmental movements thrive in Indian society while others face violent threats (Kashwan 2017, 10). Yet these contradictory workings of the Indian state must be understood in the context of global capitalism and its domestic beneficiaries. Instead of weakening state control in the wake of economic liberalization in the early 1990s and beyond, the Indian state has transformed into a highly centralized and extractive state that abuses its authority blatantly to selectively reallocate land and other natural resources (Rajan 2011).
A numerical study supplemented with theoretical analysis is made, to analyse the electrophoresis of highly charged soft particles in electrolytes with trivalent counterions. The electrokinetic model is devised under the continuum hypothesis, which incorporates the ion–ion electrostatic correlations, hydrodynamic steric interactions of finite sized ions and ion–solvent interactions. The governing equations for ion transport and electric field are derived from the volumetric free energy of the system, which includes the first-order correction for the non-local electrostatic correlations of interacting ions, excess electrochemical potential due to finite ion size as well as the Born energy difference of ions due to dielectric permittivity variation. The electrolyte viscosity is considered to be a function of the local volume fraction of finite-sized ions, which causes the diffusivity of ions to vary locally. The occurrence of mobility reversal of a soft particle having the same polarity of its core and soft shell charge and formation of a coion-dominated zone in the soft layer is elaborated through this study. This can explain the mechanisms for the attraction between like-charged soft particles, as seen in the condensation of DNAs. The impact of ion–ion correlations and ion–solvent interactions of finite-sized ions are analysed by comparing them with the results based on the standard model. At a higher range of the core charge density, the ion–ion correlations induce a condensed layer of counterions on the outer surface of the core, which draws coions in the electric double layer, leading to an inversion in polarity of the charge density and mobility reversal. The dielectric decrement and ion steric interactions create a saturation in ion distribution and hence, modify the condensed layer of counterions. The enhanced fixed charge density of the polyelectrolyte layer diminishes the ion correlations due to the stronger screening effects and prevents the formation of a coion dominated zone in the Debye layer. The impact of the counterion size and the mixture of monovalent and trivalent counterions on mobility is analysed.
We studied flow organization and heat transfer properties in mixed turbulent convection within Poiseuille–Rayleigh–Bénard channels subjected to temporally modulated sinusoidal wall temperatures. Three-dimensional direct numerical simulations were performed for Rayleigh numbers in the range $10^6 \leqslant Ra \leqslant 10^8$, a Prandtl number $Pr = 0.71$ and a bulk Reynolds number $Re_b \approx 5623$. We found that high-frequency wall temperature oscillations had minimal impact on flow structures, while low-frequency oscillations induced adaptive changes, forming stable stratified layers during cooling. Proper orthogonal decomposition (POD) analysis revealed a dominant streamwise unidirectional shear flow mode. Large-scale rolls oriented in the streamwise direction appeared as higher POD modes and were significantly influenced by lower-frequency wall temperature variations. Long-time-averaged statistics showed that the Nusselt number increased with decreasing frequency by up to 96 %, while the friction coefficient varied by less than 15 %. High-frequency modulation predominantly influenced near-wall regions, enhancing convective effects, whereas low frequencies reduced these effects via stable stratified layer formation. Phase-averaged statistics showed that high-frequency modulation resulted in phase-stable streamwise velocity and temperature profiles, while low-frequency modulation caused significant variations due to weakened turbulence. Turbulent kinetic energy (TKE) profiles remained high near the wall during both heating and cooling at high frequency, but decreased during cooling at low frequencies. A TKE budget analysis revealed that during heating, TKE production was dominated by shear near the wall and by buoyancy in the bulk region; while during cooling, the production, distribution and dissipation of TKE were all nearly zero.
The resonance mechanism in the initial of wind-wave generation proposed by Phillips (1957. J. Fluid Mech.2, 417–445) is a foundation of wind-wave generation theory, but a precise theoretical quantification of wave energy growth in this initial stage has not been obtained yet after more than six decades of research. In this study, we aim to address this knowledge gap by developing an analytical approach based on a novel complex analysis method to theoretically investigate the temporal evolution of the wave energy in the Phillips initial stage. We quantitatively derive and analyse the growth behaviour of the surface wave energy and obtain an analytical solution for its upper bound. Our result highlights the crucial effects of surface tension. Because the phase velocity of gravity–capillary waves has a minimal value at a critical wavenumber, gravity–capillary waves and gravity waves (which neglect surface tension) exhibit distinct resonance curve properties and wave energy growth behaviours. For gravity waves, the resonance curve extends indefinitely; for gravity–capillary waves, it either forms a finite-length curve or does not exist, depending on the wind speed. The leading-order term of the upper-bound solution of the energy of gravity waves increases linearly over time, while for gravity–capillary waves, the term increases linearly over time under strong wind conditions but remains finite under weak wind conditions. This theoretical study provides an analytical framework for the generation of wind-waves in the Phillips initial stage, which may inspire further theoretical, numerical and experimental research.
The fossil record of dinosaurs in Scotland mostly comprises isolated highly fragmentary bones from the Great Estuarine Group in the Inner Hebrides (Bajocian–Bathonian). Here we report the first definite dinosaur body fossil ever found in Scotland (historically), having been discovered in 1973, but not collected until 45 years later. It is the first and most complete partial dinosaur skeleton currently known from Scotland. NMS G.2023.19.1 was recovered from a challenging foreshore location in the Isle of Skye, and transported to harbour in a semi-rigid inflatable boat towed by a motor boat. After manual preparation, micro-CT scanning was carried out, but this did not aid in identification. Among many unidentifiable elements, a neural arch, two ribs and part of the ilium are described herein, and their features indicate that this was a cerapodan or ornithopod dinosaur. Histological thin sections of one of the ribs support this identification, indicating an individual at least eight years of age, growing slowly at the time of death. If ornithopodan, as our data suggest, it could represent the world's oldest body fossil of this clade.
It is now accepted that the future of coal will be decided in the developing world. Even as Western countries transition away from coal, increased production and consumption of coal in India and China have meant that the share of coal in global energy production has remained constant for the past 40 years, despite attempts at decarbonization (Edwards 2019). Nevertheless, the West continues to produce high per capita emissions compared to developing nations (Lazarus and van Asselt 2018). In response, India has asserted its rights to equitable energy access in the international arena (Jaitly 2021). At the same time, questions of intra-country equity complicate India's position, with many arguing that India must pursue low-carbon pathways to protect its poor and vulnerable groups (Bidwai 2012).
After Independence, coal became an enduring symbol of national development in India (Lahiri-Dutt 2014). The coal industry has deep political roots, engaging powerful stakeholders at different levels (Bhattacharjee 2017). In recent years, coal investments have lost their appeal due to unrest over their environmental impacts as well as a dynamic downward trend in the demand for thermal power (Rajshekhar 2021). Even so, production targets for the state-owned Coal India Limited (CIL) – responsible for over 80 per cent of India's coal production – were increased to 1 billion metric tonnes by 2024. The central government is actively looking to sell more coal blocks to raise money, despite the lukewarm response to recent coal block auctions. Coal imports have simultaneously increased, engendering a new coastal coal geography controlled by private actors (Oskarsson et al. 2021). That renewables cannot substitute for coal, despite policy support from the state, is accepted. Analysts expect coal-fired generation to continue to grow to meet electricity demand growth even if 350 gigawatt (GW) of renewable energy (RE) capacity is installed by 2030 (Tongia and Gross 2019). New energy forms, including renewables, are, historically speaking, energy ‘additions’ rather than ‘transitions’ (Oskarsson et al. 2021). Importantly, this perception is not typical of India alone, as the global energy system remains locked into high coal energy use in the midst of an RE boom (Oskarsson et al. 2021).
India's water crisis has been widely covered in the international and national press. In the summer of 2019, the New York Times published a series of reports and features on the prospects of Chennai and other large Indian cities running out of water (Subramanian 2019). Data on the absolute scarcity of water, sometimes illustrated using dramatic satellite imageries of water bodies, often dominate discussions on India's water crisis (Sengupta 2019). Recall, for example, the 2019 report about 21 Indian cities running out of groundwater by 2020 (ANI 2019a). We are now well past the dreaded summer of 2020 but there has been no follow-up reportage. The argument that India's water crisis lingers because its effects are experienced unequally along multiple dimensions – caste, class, and gender – is hardly a controversial one for scholars. However, there has been very little discussion in both the international and domestic press of the gross inequalities in access to water. The New York Times report mentions the poor, while another describes how women sacrificed daily showers so that office-going male members of the family could afford the luxury instead (Denton and Sengupta 2019). An overwhelming focus on water scarcity instead of water inequalities, we argue, is one of the major causes for the perpetuation of India's water crisis. In this chapter, we seek to examine how the intersection of social inequalities and climate change contributes to water injustice.
In India, access to water is determined by a complex entwining of caste, class, and gender identities that work to perpetuate structural inequalities. While geography and the quality of physical infrastructure greatly influence the extent of water insecurity, they are not entirely responsible for it. In some parts of the country, safe drinking water is inaccessible, causing widespread suffering, illness, and disease. In other regions, cheap and state-subsidized access to water is taken for granted and easily abused (Fatah 2013). The army cantonment and government districts in Delhi receive 375 litres of water per capita per day. On the other hand, South Delhi's Sangam Vihar, an area with a large number of ‘unauthorized colonies’ and home to many lower-income religious minorities, receives a meagre 40 litres of municipal water per person.
The carbon emissions of the world's richest 1 per cent are more than double the emissions of the poorest 50 per cent, despite the fact that climate change is expected to disproportionately affect the poor, especially in the warmer parts of the world (Oxfam 2020; Goswami 2020). This suggests that climate and socio-economic justice are intertwined, and understanding the nature of the relationship between carbon emissions and economic inequality can help us arrive at potential pathways to address both.
Climate and socio-economic justice are crucial in the case of India. India is a significant player in the global economy, as its gross domestic product (GDP) is the fifth largest in the world (World Bank 2021). However, the country also experiences staggering levels of economic inequality. It has the third highest number of billionaires, but it also has the largest poor population in the world (Ankel 2020; Roser and Ortiz-Ospina 2019). The wealth of the richest 1 per cent of the Indian population is more than four times the total wealth of the bottom 70 per cent (Economic Times 2020). These indicators of economic inequality demonstrate a dire need to enhance socio-economic justice in India.
Three different indicators of carbon emissions are widely used for analytical purposes. The present climate crisis resulted from historically accumulated greenhouse gas emissions, measured in carbon dioxide equivalents. The United States (US) is the largest contributor, accounting for about 25 per cent of the global cumulative carbon emissions between 1751 and 2019, while India contributed about 3 per cent (Ritchie 2019). Hence, India's historical cumulative carbon emission is rather low. The second indicator measures annual carbon emissions, or a country's current emission levels. Based on this indicator, India has the third highest carbon emission levels globally; it trails China and the US by a huge margin. The third indicator is per capita annual emissions, which accounts for differences in the population size of countries. When countries are ranked in descending order of their per capita carbon emissions, India ranked 128 out of 210 countries in 2019 (Crippa et al. 2020). Even though India's per capita carbon emissions and its share in cumulative global emissions is low, its current scale of emissions is a matter of concern (Matthews 2016).
Arundhati Roy famously described the COVID-19 pandemic as a
portal, a gateway between one world and the next. We can choose to walk through it, dragging the carcasses of our prejudice and hatred, our avarice, our data banks and dead ideas, our dead rivers and smoky skies behind us. Or we can walk through lightly, with little luggage, ready to imagine another world. And ready to fight for it. (Roy 2020)
As inspiring and insightful as these words are, such juxtaposition of utopia and dystopia barely scratches the surface of what and who we are as a nation. The soulcrushing images of burning pyres in parking lots turned into makeshift graveyards, which international and national media have immortalized, offer a clue, as does the sombre poetry of Parul Khakhar (Tripathi 2021). India is a land pockmarked with a million fires.
The COVID-19 crisis has come as a shock to many middle-class Indians. Yet, to India's Dalits, Adivasis, women, and other marginalized groups, haunted by centuries of oppression, this crisis is yet another in a long list of historical and ongoing crises. For example, the coalfields of Jharia in Jharkhand have been burning for over a century now. As a result, at least 130,000 families have, quite literally, lived through a century-long trial by fire (Rahi 2019). Since 1995, the state-owned Bharat Coking Coal Limited (BCCL) has claimed to have a ‘master plan’, which is possibly gathering dust in some almirah of the coal ministry (S. Kumar 2021). One would imagine that a pandemic like COVID-19 might scare the minister whose job includes ensuring the welfare of the 3.6 million people who work in mines with a less than adequate supply of fresh air. Yet, in 2020, India's coal minister valorized coal workers as ‘our coal warriors who are toiling day and night to keep the lights on even during the corona pandemic’ (Press Information Bureau 2020). They toiled very hard indeed.
A year later, as India struggled to confront the monstrous second wave of the pandemic, Central Coalfields Limited (CCL), a subsidiary of Coal India Limited (CIL), recorded the highest-ever single-day coal dispatch of 80 railway rakes (PNS 2021).
The contribution of colonialism and imperial expropriation to the unfolding climate crisis has been well documented on a global scale. This chapter seeks to interrogate the role of caste as a structural element in shaping environmental inequities within India and beyond. Scientists across disciplines agree that the current system of production is unsustainable at the planetary level, even if a consensus on how to address this issue remains elusive. I argue that in the case of India, accounting for historical and contemporary caste-based extraction is crucial for any meaningful realization of climate justice.
Globally, academic scholarship and policy have come to acknowledge the uneven and unjust ways in which the burden and responsibility for the current crisis are distributed across nations, ethnicities, races, and genders. There is an emerging consensus that the historical pathways of colonialism and capitalist development are directly responsible for this uneven distribution. This pattern is seen across the histories of energy production, plantation economies, and commercial agriculture, as demonstrated in the detailed work of political ecologists (for example, Li 2017). Consequently, the idea that mitigation, adaptation, and resilience-building strategies must account for this historical unevenness is no longer controversial.
We see this acknowledgement in the principle of ‘common but differentiated responsibility’ formally adopted by the United Nations in 1992. Under this principle, world governments recognize the lesser contribution of formerly colonized countries such as India towards planetary environmental degradation. This can be read as an acknowledgement of the unequal distribution of political power and economic prosperity across world nations because of colonialism. Acknowledging this historicity of the climate crisis is important, but our understanding of it would remain incomplete without a serious stock-taking of those dimensions of inequality and unevenness that significantly pre-date the rise of colonial capitalism and are yet implicated in its development trajectory. These dimensions of inequality often operate at the national or sub-national levels and therefore escape scrutiny on the global stage. In the case of India, one such important and all-pervasive dimension of inequality is caste.
For decades, anthropological and historical scholarship on caste focused only on ritual, scriptural, and mythical dimensions, thus constructing the issue as a matter of religion alone. Anti-caste scholars and activists such as Ambedkar, Phule, and Periyar have resisted such ‘orientalist’ representations of caste.
‘Climate change seems to be the last of the priorities of the state and central government. Despite various climate plans, we continue to privatize coal and divert forest land. How does one reconcile these decisions with the objectives of the climate action plan?’ asked a senior administrative officer in the Odisha Revenue and Disaster Management Department when questioned about the auctioning of new coal blocks and the state's climate action plan. His grim observation points to the political and economic barriers against implementing an effective climate policy that addresses climate justice in India.
In this chapter, we argue that India's climate policy fails to adequately address difficult political questions related to climate justice and rising inequality. As our analysis of state and national climate action plans show, India's engagement with questions of climate justice remains merely symbolic. This directly follows from the country's stance in international climate negotiations, during which it has shied away from undertaking rigorous domestic climate action citing high levels of poverty and a need to focus on economic growth (Kashwan and Mudaliar 2021).
Our analysis of India's national and state climate action plans offers insights into the often-unstated normative principles that guide decision-making on climate change within the country. In this study, we demonstrate how, if at all, these action plans incorporate questions of justice and equality. We argue that most of India's climate action plans demonstrate a superficial understanding of socio-economic inequalities and hence fail to adequately address the disproportionate impact of climate events on the poor and marginalized.
We begin by discussing the principles that guide climate policy internationally and domestically. We then provide a critical overview of national and state climate action plans. We then scrutinize these action plans in terms of substantive equality and climate justice criteria, namely caste, gender, poverty, and co-benefits for development. We then analyse the action plans with regard to their treatment of these substantive criteria, the limitations in their approach, and possible strategies to address these limitations.
Background
Internationally, India is known to have pioneered the approach of common but differentiated responsibilities (CBDR), which allows developing countries to prioritize poverty alleviation and economic growth over climate mitigation.
This study introduces a novel approach to investigate the Reynolds analogy in complex flow scenarios. It is shown that the total mechanical energy $\mathit {B}$, viz. the sum of kinetic energy and pressure work, and the field $\Gamma =\theta ^2/2$ (where $\theta$ is the transported passive scalar) are governed by two equations that are similar in form, when time-averaged for statistically stationary flows. For fully developed channel flows the integral energy balance links the mean bulk velocity and scalar with the volume averages of the respective dissipation rates, allowing the assessment of the Reynolds analogy in terms of the dissipation fields. This approach is tested on direct numerical simulation data of rough-wall turbulent channel flow at two different roughness Reynolds numbers, namely $k^+=15$ and $k^+=90$. For a unit Prandtl number, the same qualitative behaviour is observed for the mean wall-normal distributions of the budget-equation terms of $B$ and $\Gamma$, the latter being larger than the corresponding terms in the mechanical-energy budget. The Reynolds decomposition of the flow into temporal mean and stochastic parts reveals that roughness primarily affects the mean-flow dissipation. For the $k^+=90$ case, the analysis shows that attached-flow and high-shear regions dominate the integral mean scalar and momentum transfer and exhibit the greatest differences between the mean mechanical and scalar dissipation rates. In contrast, well-mixed regions, sheltered by large roughness elements, contribute similarly and minimally to the integral scalar and momentum transfer.