Wind and solar farms offer a major pathway to clean, renewable energies. However, these farms would significantly change land surface properties, and, if sufficiently large, the farms may lead to unintended climate consequences. In this study, we used a climate model with dynamic vegetation to show that large-scale installations of wind and solar farms covering the Sahara lead to a local temperature increase and more than a twofold precipitation increase, especially in the Sahel, through increased surface friction and reduced albedo. The resulting increase in vegetation further enhances precipitation, creating a positive albedo–precipitation– vegetation feedback that contributes ~80% of the precipitation increase for wind farms. This local enhancement is scale dependent and is particular to the Sahara, with small impacts in other deserts. Efforts to build such large-scale wind and solar farms for electricity generation may still face many technological (e.g., transmission, efficiency), socioeconomic (e.g., cost, politics), and environmental challenges, but this goal has become increasingly achievable and cost-effective. These results indicate that renewable energy can have multiple benefits for climate and sustainable development and thus could be widely adopted as a primary solution to the challenges of global energy, climate change, and environmental and societal sustainability.
Tag Archive for: Renewable Energy
Renewable energy is a promising alternative to fossil fuel based energy, but its development can require a complex set of environmental tradeoffs. A recent increase in solar energy systems, especially large, centralized installations, underscores the urgency of understanding their environmental interactions. Synthesizing literature across numerous disciplines, the researchers review direct and indirect environmental impacts both beneficial and adverse of utility scale solar energy (USSE) development, including impacts on biodiversity, land use and land cover change, soils, water resources, and human health. Additionally, they review feedbacks between USSE infrastructure and land atmosphere interactions and the potential for USSE systems to mitigate climate change. Several characteristics and development strategies of USSE systems have low environmental impacts relative to other energy systems, including other renewables. We show opportunities to increase USSE environmental co benefits, the permitting and regulatory constraints and opportunities of USSE, and highlight future research directions to better understand the nexus between USSE and the environment. Increasing the environmental compatibility of USSE systems will maximize the efficacy of this key renewable energy source in mitigating climatic and global environmental change. Utility scale solar energy systems are on the rise worldwide, an expansion fueled by technological advances, policy changes, and the urgent need to reduce both our dependence on carbon intensive sources of energy and the emission of greenhouse gases to the atmosphere. Recently, a growing interest among scientists, solar energy developers, land managers, and policy makers to understand the environmental impacts both beneficial and adverse of USSE, from local to global scales, has engendered novel research and findings. This review synthesizes this body of knowledge, which conceptually spans numerous disciplines and crosses multiple interdisciplinary boundaries. The disadvantageous environmental impacts of USSE have not heretofore been carefully evaluated nor weighted against the numerous environmental benefits particularly in mitigating climate change and co benefits that solar energy systems offer. Indeed, several characteristics and development strategies of USSE systems have low environmental impacts relative to other energy systems, including other renewable energy technologies. Major challenges to the widespread deployment of USSE installations remain in technology, research, and policy. Overcoming such challenges, high lighted in the previous sections, will require multidisciplinary approaches, perspectives, and collaborations. This review serves to induce communication across relatively disparate disciplines but intentional and structured coordination will be required to further advance the state of knowledge and maximize the environmental benefits of solar energy systems at the utility scale.
This Note examines how Section 94-C is an improvement from earlier siting regimes in NYS, which emphasized a time intensive and comprehensive approval process primarily tailored to the environmental and socioeconomic impacts of fossil-fuel power projects. This Note explains how Section 94-C sought to bridge the historical disconnect between old siting statutes with NYS’s more recent priorities for renewable energy adoption and addressing climate change. This Note demonstrates how Section 94-C can bypass massive delays, provided that ORES establishes more reasonable and predictable substantive standards, as well as reduces the complexity and extent of procedural requirements for developers.
The contributions of this special issue address at least one political phenomenon in the context of sustainable energy transformation: populism, post-truth politics, and local resistance.
Wind and solar generation require at least 10 times as much land per unit of power produced than coal- or natural gas-fired power plants, including land disturbed to produce and transport the fossil fuels. Additionally, wind and solar generation are located where the resource availability is best instead of where is most convenient for people and infrastructure, since their “fuel” can’t be transported like fossil fuels.
To analyze public perception of coal and solar energy and support for public policy that assists in a just energy transition, we conducted a mail survey in the summer of 2018 among a random sample of residents in three regions of the United States: Houston, TX, a large city with close ties to the oil industry, Burlington, VT, a medium-sized city that is solely powered by renewable energy sources, and Saline County, IL, a rural area with a long history of coal mining.
With the coming of the 21st century in the U.S., reliance on fossil fuels, in particular coal, decreased while renewable energy sources increased their contribution to the U.S. energy portfolio. The factors behind this emerging trend toward a decreased reliance on coal are many, including economic as well as policy goals. Nationally, support is strong for the general transition to renewable energy, but this support can decline at the local level particularly if renewable energy is perceived as have negative local economic impact, impeding implementation. However, some look at this as part of a transition to a new economic power structure. Due to a lack of research on identifying public preferences for energy production in the United States, the authors conducted a national survey to identify drivers and barriers of acceptance of different types of electrical energy production.
The National Center for Appropriate Technology has launched America’s first AgriSolar Clearinghouse to connect farmers, ranchers, land managers, solar developers, and researchers with trusted, practical information to increase the co-location of solar and agriculture.
In less than a decade, solar installations are expected to cover more than 3 million acres of the United States, creating a big opportunity to pair solar with agricultural land to produce food, conserve ecosystems, create renewable energy, increase pollinator habitat, and maximize farm revenue.
In this episode of the ATTRA podcast series, Voices from the Field, NCAT Communications Director Emilie Ritter Saunders speaks with Energy Programs Director Stacie Peterson, Phd., about how the AgriSolar Clearinghouse aims to make solar more accessible to land managers looking to make the most out of their land, diversify their revenue, and produce renewable energy.
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