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New York City’s policy efforts in the first two decades of the twenty-first century emphasize the potential for local governments to materially improve their local environments. During the mayoralty of Michael Bloomberg (2002-2013), the city government sought from the top to remake the city’s physical environment to appeal to postindustrial elites to promote local economic development. Under Mayor Bill de Blasio (2014-2021), the administration explicitly prioritized equity alongside economic growth and this commitment was reflected in environmental policy in a focus on investing in community parks. Under both mayors, environmental policy came from community groups, as well as city leaders. For example, across the two administrations, prominent environmental justice advocates prompted the city to adopt measures to address longstanding inequities in the allocation of responsibility for solid waste management, although the injustices persisted at the end of the de Blasio administration. Overall, the history of New York City’s efforts to address problems such as lack of greenspace, contaminated lands, and solid waste management underscores that change can come from the top and the bottom, but that there are legal, fiscal and other constraints on the ability of cities to address even paradigmatically local environmental problems.
Humanity’s impact on the planet is undeniable. Fairly and effectively addressing environmental problems begins with understanding their causes and impacts. Is over-population the main driver of environmental degradation? Poverty? Capitalism? Poor governance? Imperialism? Patriarchy? Clearly these are not technical questions, but political ones.
Updated to cover new debates, data, and policy, and expanded to include chapters on colonialism, race and gender, and the impacts of energy and resource extraction, this book introduces students to diverse perspectives and helps them develop an informed understanding of why environmental problems occur.
How the international community should act is deeply contested. Guiding students through the potential responses, including multilateral diplomacy, transnational voluntary action, innovative financial mechanisms, problem displacement, consumer-focused campaigns, and resistance, this book explains the different forms of political action, their limitations and injustices.
Online resources include lecture slides, a test bank for instructors, updated weblinks to videos, and suggested readings for students.
Many of the contemporary discussions of the potential for cities to address climate change overlook the historical efforts of cities to protect their residents from environmental harms. In the nineteenth and early twentieth centuries, before the emergence of the administrative state at the state and federal levels, local governments were often the first level of government to provide many Americans with environmental protection. Supplying safe drinking water was an early priority for expanding cities. With water more readily available, city governments then built sewage systems. They also built parks, established systems for collecting solid waste, and attempted to address air pollution from the combustion of coal. The historical efforts of cities, well documented by historians, emphasize that city governments can positively contribute to protecting the environment. However, these efforts also offers cautionary lessons about the limitations of relying on local governments to address large-scale problems, and help to explain the substantial federalization of environmental law in the latter twentieth century. Federalization diminished the ability of cities to innovate in the environmental field but cities still have considerable legal authority to pursue environmental policies to address contemporary challenges.
Humanity’s impact on the planet is undeniable. Fairly and effectively addressing environmental problems begins with understanding their causes and impacts. Is over-population the main driver of environmental degradation? Poverty? Capitalism? Poor governance? Imperialism? Patriarchy? Clearly these are not technical questions, but political ones.
Updated to cover new debates, data, and policy, and expanded to include chapters on colonialism, race and gender, and the impacts of energy and resource extraction, this book introduces students to diverse perspectives and helps them develop an informed understanding of why environmental problems occur.
How the international community should act is deeply contested. Guiding students through the potential responses, including multilateral diplomacy, transnational voluntary action, innovative financial mechanisms, problem displacement, consumer-focused campaigns, and resistance, this book explains the different forms of political action, their limitations and injustices.
Online resources include lecture slides, a test bank for instructors, updated weblinks to videos, and suggested readings for students.
Humanity’s impact on the planet is undeniable. Fairly and effectively addressing environmental problems begins with understanding their causes and impacts. Is over-population the main driver of environmental degradation? Poverty? Capitalism? Poor governance? Imperialism? Patriarchy? Clearly these are not technical questions, but political ones.
Updated to cover new debates, data, and policy, and expanded to include chapters on colonialism, race and gender, and the impacts of energy and resource extraction, this book introduces students to diverse perspectives and helps them develop an informed understanding of why environmental problems occur.
How the international community should act is deeply contested. Guiding students through the potential responses, including multilateral diplomacy, transnational voluntary action, innovative financial mechanisms, problem displacement, consumer-focused campaigns, and resistance, this book explains the different forms of political action, their limitations and injustices.
Online resources include lecture slides, a test bank for instructors, updated weblinks to videos, and suggested readings for students.
Humanity’s impact on the planet is undeniable. Fairly and effectively addressing environmental problems begins with understanding their causes and impacts. Is over-population the main driver of environmental degradation? Poverty? Capitalism? Poor governance? Imperialism? Patriarchy? Clearly these are not technical questions, but political ones.
Updated to cover new debates, data, and policy, and expanded to include chapters on colonialism, race and gender, and the impacts of energy and resource extraction, this book introduces students to diverse perspectives and helps them develop an informed understanding of why environmental problems occur.
How the international community should act is deeply contested. Guiding students through the potential responses, including multilateral diplomacy, transnational voluntary action, innovative financial mechanisms, problem displacement, consumer-focused campaigns, and resistance, this book explains the different forms of political action, their limitations and injustices.
Online resources include lecture slides, a test bank for instructors, updated weblinks to videos, and suggested readings for students.
Cirques are classic glacial erosion landforms, and studying their morphological development provides valuable paleoclimatic and paleoenvironmental insights. However, research on cirques on the Tibetan Plateau and surrounding mountain ranges has focused primarily on the southern, eastern, and northwestern plateau, with limited attention given to the northeastern region, hindering comparative analyses between different regions. In this study, 1132 ice-free cirques in the Qilian Mountains on the northeastern edge of the Tibetan Plateau are examined, and their spatial distribution patterns and influential factors are analyzed. The results show that the cirques’ aspect in the Qilian Mountains is predominantly north-facing. Influenced by climate and lithology, the size of the cirques gradually increases from east to west, and the elevation parameters of the cirques are significantly affected by aspect.. The cirques in the western section are shaped primarily by lateral erosion, whereas those in the central section experience more balanced erosion, and those in the eastern section are controlled primarily by longitudinal erosion. A comparison with existing cirque morphological data from other regions of the Tibetan Plateau and surrounding mountain ranges reveals that the formation of cirques is affected by both climatic and non-climatic factors, and their formation ages are difficult to determine.
Quantitative results from regional climate models (RCMs) run over ice sheets are frequently used to make projections of surface melt, ice-shelf stability, and subsequently sea-level rise. However, modelled relevant mass fluxes need to be evaluated first before using future output data for projections. This study makes the case for a two-step framework when evaluating RCMs. Firstly, the reliability of the RCM when forced with reanalysis data must be assessed through comparison with historical observations. Secondly, the accuracy of using a non-observationally constrained Earth System Model as forcing must be assessed through comparison with the reanalysis forced run during the same historical period. Simulating surface melt in Antarctica with the RCM RACMO2.3p2 is given as an example. Applying this two-step procedure we show that RACMO2.3p2 respectively forced with ERA5 and CESM2 is robust for modelling contemporary and future surface melt in Antarctica. Building on this conclusion, we briefly discuss an application, i.e. three future SSP realizations of melt-over-accumulation across the Antarctic ice sheet until 2100 are presented, providing insights into the future sensitivity to meltwater ponding of major Antarctic ice shelves.
The present work brings to light the vibrations emerging when a circular cylinder, elastically mounted along a rectilinear path in quiescent fluid, is subjected to a forced rotation about its axis. These rotation-induced vibrations (RIV) are explored numerically for ranges of the four governing parameters. The Reynolds number and the reduced velocity (inverse of the non-dimensional natural frequency of the oscillator), based on the surface velocity of the rotating body and its diameter, are varied up to $100$ and $250$, respectively, and the structural damping ratio up to $50\,\%$. The structure to displaced fluid mass ratio ranges from $0.1$ to $1000$. Vibrations are found to occur over a vast region of the parameter space, including the four orders of magnitude of the mass ratio under study, and high levels of structural damping. The amplitude of RIV may exceed $30$ body diameters, while their frequency varies and deviates from the oscillator natural frequency, even though it is always lower. Despite its simplicity and the steady nature of the actuation, the system exhibits a considerable diversity of behaviours. Three distinct RIV regimes are encountered: two periodic regimes whose responses differ by their spectral contents, i.e. sinusoidal versus multi-harmonic, and an aperiodic regime. These regimes are all closely connected to flow unsteadiness, in particular via the interplay of the cylinder with previously formed vortices, which persist in the vicinity of the body.
Most American environmental law scholarship overlooks the role of cities in environmental law and policy. Instead, scholars typically focus on federal environmental law. This book emphasizes the potential for leading cities to play a meaningful role in protecting the environment. It offers a framework for understanding the factors that give to, and constrain, local environmental law and policy. Local environmental policy may emerge from the top from local elites centrally concerned with local economic development, and from the “bottom up” from community groups. However, there are limits on the costs that local governments can impose on local actors to address global environmental problems, such as limiting climate change, given the overriding importance that local governments attach to promoting economic development. The book offers case studies of local environmental efforts in New York City to illustrate the promise and limitations of local environmental policy. Taking into account the opportunities and constraints at the local level, the book outlines a high-level agenda of actions that local governments in large cities should undertake to adapt to climate change and contribute to decarbonization.
In the face of the federal government’s failure to tackle climate change in the early decades of this century, large cities in the U.S. started to take action. Networks of city governments and philanthropists offered cities support, and cities invested their own resources in sustainability offices. However, cities made limited progress in reducing their greenhouse gas emissions in the first two decades of this century. This book provides a clear-eyed analysis of the potential for big city governments to address society’s most pressing environmental problems, including limiting and adapting to climate change. It includes original case studies of New York’s environmental policy efforts in the first two decades of this century, which ground its analysis of the promise and perils of turning to cities to address climate change and other environmental issues. Drawing on the book’s analysis of cities’ strengths and weaknesses, it outlines a high-level agenda for urban environmental policy for the near term. With President Trump’s return to power in 2025, and his promises to undo many aspects of federal environmental law, it is more important than ever for environmental advocates and scholars to understand the potential and limits of local action to fill the gap.
We study the rebound of drops impacting non-wetting substrates at low Weber number ($\textit{We}$) through experiment, direct numerical simulation and reduced-order modelling. Submillimetre-sized drops are normally impacted onto glass slides coated with a thin viscous film that allows them to rebound without contact line formation. Experiments are performed with various drop viscosities, sizes and impact velocities, and we directly measure metrics pertinent to spreading, retraction and rebound using high-speed imaging. We complement experiments with direct numerical simulation and a fully predictive reduced-order model that applies natural geometric and kinematic constraints to simulate the drop shape and dynamics using a spectral method. At low $\textit{We}$, drop rebound is characterised by a weaker dependence of the coefficient of restitution on $\textit{We}$ than in the more commonly studied high-$\textit{We}$ regime, with nearly $\textit{We}$-independent rebound in the inertio-capillary limit, and an increasing contact time as $\textit{We}$ decreases. Drops with higher viscosity or size interact with the substrate longer, have a lower coefficient of restitution and stop bouncing sooner, in good quantitative agreement with our reduced-order model. In the inertio-capillary limit, low-$\textit{We}$ rebound has nearly symmetric spreading and retraction phases and a coefficient of restitution near unity. Increasing $\textit{We}$ or viscosity breaks this symmetry, coinciding with a drop in the coefficient of restitution and an increased dependence on $\textit{We}$. Lastly, the maximum drop deformation and spreading are related through energy arguments, providing a comprehensive framework for drop impact and rebound at low $\textit{We}$.
Serra de Tramuntana of Mallorca is a mountain range built of a stack of thrust sheets composed mostly of Mesozoic platform carbonates, and it formed in the Oligocene and Miocene during the Alpine orogeny. Volcanic rocks, intruding the Triassic sediments, and known mostly from the bottom of the lowest thrust sheet, offer an opportunity for dating the post-sedimentary thermal history of this mountain range and for evaluating the maximum palaeotemperatures by studying the mineralogy and K–Ar dating of authigenic illite. Such a study was conducted on 16 samples from two outcrops, employing X-ray diffraction (XRD), optical microscopy, electron probe microanalysis and K–Ar dating of separated clay fractions. Illite was found in 10 samples, but only one sample was identified as pure volcanic rock, not contaminated by older detrital material. This sample yielded a K–Ar age of 133–140 Ma, which is within the experimental error for three grain-size fractions. This was confirmed by extrapolating the ages of a contaminated sample, and it is interpreted as representing the age of the maximum palaeotemperatures. These palaeotemperatures were estimated using several illite characteristics, including the Kübler Index applied to shales as below but close to the diagenesis/anchimetamorphism boundary (180–200°C). The dated pre-tectonic early Cretaceous thermal event is interpreted as recording the extremely high geothermal gradient at the end of the Mesozoic extensional phase. The maximum palaeotemperatures during the Oligocene–Miocene tectonic burial of Mallorca were not high enough to reset the Mesozoic K–Ar age of illite, thus being lower than ∼250°C, and, based on the preserved Cretaceous illite XRD characteristics, lower than 180–200°C.
While local efforts to decarbonize will mainly benefit the world as a whole, local efforts to adapt to climate change will benefit mainly people in cities, who will be more resilient to the extreme heat, drought, flooding and fires that planetary warming is exacerbating. Reflecting the benefits to cities of adapting, cities began planning adaptation early in the twenty-first century. However, as of the early 2020s, US cities had undertaken little adaptation (as opposed to adaptation planning). From 2000 until 2012, when Superstorm Sandy struck the city, New York policymakers focused on gathering information about the risks that climate change presents for the city, but they undertook few tangible actions to protect the city against risks such as storm surge flooding. Sandy increased policymakers’ perception of the urgency of acting to adapt, and injected $15 billion of federal funding into the city that enabled it to invest in adaptation. Yet, between 2012 and the early 2020s, the city had great difficulty implementing adaptation actions. New York City’s top-down approach to climate change adaptation underscores the difficulties that cities face implementing the costly local public good of climate change adaptation without additional assistance from higher levels of government.