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The US experienced a nearly four-fold increase in electricity from wind and solar between 2007 and 2012, with nine states already generating 10 percent or more of their power from these sources. The document asserts that current grid tools can handle higher percentages of variable renewable energy and that a combination of wind, solar, geothermal, biomass, and hydropower could supply 80 percent of US electricity by 2050, with wind and solar alone contributing 50 percent.

The report examines the growth of wind and solar power in the U.S. and globally, asserting that the technical challenges of variable energy sources are manageable. It highlights successful integration by utilities like Xcel Energy and countries like Denmark and Germany. The document details various tools for maintaining reliability—including geographic dispersion, improved forecasting, transmission upgrades, and energy storage—and cites studies suggesting that renewables could provide 80% of U.S. electricity by 2050.

A group of environmental and scientific organizations argues against the EPA's proposal to include Arundo donax (giant reed) as an approved advanced biofuel feedstock. They cite the species' status as a high-risk invasive weed that threatens native vegetation and endangered species, noting that the high cost of eradication makes the ecological and economic risks outweigh the benefits of its cultivation under the Renewable Fuel Standard.

The document describes the technical operation of battery electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), noting that a range of 60 to 120 miles can satisfy the vast majority of daily travel needs. It details the 2012 U.S. market, highlighting the Chevrolet Volt and Nissan LEAF as dominant models and comparing specifications for several other vehicles. The text analyzes the economic impact of battery costs, the necessity of charging infrastructure, and the role of federal and state tax credits in making PEVs commercially viable.

The document distinguishes between all-electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), noting that EVs offer lower maintenance and no tailpipe emissions. It highlights that while the U.S. market is dominated by the Chevrolet Volt and Nissan Leaf, new models like the Tesla Model S provide significantly higher ranges. The text identifies battery costs as the primary expense for PEVs, with projections suggesting prices could drop from $690 per kWh in 2012 to $160 per kWh by 2025. It also details the disparity between the 8,000 public charging stations and 150,000 gasoline stations in the U.S., and outlines federal tax credits up to $7,500 and various state-level incentives in California, Washington, and Colorado.

The research paper evaluates four types of cost limits—alternative compliance payments, contract price caps, retail rate/revenue impact caps, and renewable energy fund caps—across several U.S. states. It finds that while cost limits can insure against unacceptably high costs, they often create market uncertainty, may act as price floors rather than ceilings, and can conflict with renewable energy targets if not aligned with expected costs. For California, the author recommends avoiding public contract-level benchmarks, ensuring the limit is consistent with expected RPS costs, and implementing a simple, clearly defined mechanism with a predictable review process.

The analysis finds that EVs generally produce lower global warming emissions than average compact gasoline vehicles, though their relative performance against high-efficiency hybrids depends on the regional electricity grid's fuel mix. In 'BEST' regions, EVs outperform 50 mpg hybrids, while in 'GOOD' regions, some hybrids remain a better choice for emissions. Financially, EV owners in 50 major U.S. cities can save between $750 and $1,200 annually in fuel costs when using the lowest-cost electricity plans, with significant additional savings available through time-of-use (TOU) rate plans, particularly in California.

The report identifies systemic barriers to evidence-based decision-making regarding hydraulic fracturing (fracking) in the U.S., including industry interference in academic and government research, legal loopholes in federal environmental laws, and a lack of transparency regarding chemical use. It highlights how non-disclosure agreements in legal settlements silence affected citizens and hide scientific data. The document provides a framework for communities to seek reliable information and calls for comprehensive laws requiring baseline and ongoing environmental monitoring and full chemical disclosure.

The brief, filed by a coalition of physicians, scientists, and environmental advocates, contends that the natural gas industry systematically suppresses public health data through federal exemptions, state laws, and confidential legal settlements. It argues that the public interest in understanding the health risks of hydraulic fracturing—such as water contamination and air pollution—outweighs the private interests of gas companies in maintaining secrecy. The authors specifically highlight the Hallowich family's experience with deteriorating health due to nearby gas operations and urge the court to reverse a lower court's decision to seal the case records.

The Clean Air Task Force (CATF) argues that the EPA's final New Source Performance Standards for the oil and gas industry must require 'green completions' to capture methane and volatile organic compounds (VOCs). The memo asserts that methane from US oil and gas operations is 25 times more potent than carbon dioxide over 100 years and contributes to global warming as much as 16% of all CO2 from US coal-fired power plants. CATF rejects industry claims that green completions are too costly or that flaring is a sufficient alternative, noting that such technologies are already used in states like Colorado and Wyoming.

The document argues that the EPA's proposed air pollution standards for the natural gas sector are essential for protecting public health and the environment, particularly through the implementation of 'green completion' technology to capture methane and smog-forming emissions from fracked wells. The authors contend that these standards are cost-effective, as the sale of recovered gas offsets compliance costs, and that they will not hinder domestic production, citing examples from Colorado and Wyoming. The letter specifically rejects proposed industry loopholes from the American Petroleum Institute (API), such as VOC percentage thresholds and implementation delays, which the authors claim would exempt millions of tons of pollution and undermine the standards' effectiveness.

The report examines how the growth of distributed energy resources (DERs), particularly rooftop solar PV, disrupts traditional utility business models in California. It argues that existing volumetric rate structures and net energy metering (NEM) create economic misalignments and cost shifts from solar adopters to non-adopters. To resolve this, the authors propose three building blocks: improving the measurement of DER costs and benefits, implementing pricing models that reflect the actual value of energy based on time and location, and adapting utility business models toward either an 'incentive regulation' or 'network utility' approach.

The document outlines how human-induced climate change has increased the probability of intense heat waves, severe droughts, and large forest fires in the U.S., citing data from NOAA and other scientific bodies to show that these events are becoming more frequent and severe than natural variability alone can explain.

The GSA Net Zero Renovation Challenge aims to move beyond shallow retrofits by leveraging ESPCs to achieve deep energy savings (over 50%) and net zero energy in a portfolio of 30-35 federal buildings. A workshop convened by RMI and GSA identified key barriers to this goal, including long procurement timelines, high financing costs, and a lack of integrative design. Proposed solutions include streamlining the ESCO selection process from 18 months to approximately 8 months, blending appropriated funds with ESPC financing, and adopting a 'right steps in the right order' approach that prioritizes load reduction before selecting HVAC and renewable systems. The challenge evaluates projects based on absolute energy savings, technical and financial creativity, and progress toward EISA 2007 goals.

A coalition of environmental organizations argues that the EPA's proposed rules for the oil and gas industry are insufficient. They demand the direct regulation of methane, the inclusion of existing sources, the elimination of exemptions for certain wells, and the regulation of hydrogen sulfide and particulate matter. The coalition also calls for more stringent toxic air pollutant limits and a more comprehensive health risk assessment for vulnerable populations.

The report finds that U.S. thermoelectric power plants withdrew between 60 billion and 170 billion gallons of freshwater daily in 2008, with coal plants accounting for the majority of this use. It identifies significant regional disparities in water intensity, noting that plants in the East generally withdraw more water due to a higher prevalence of once-through cooling. The analysis reveals that power plants contributed to water-supply stress in 20% of the 400 stressed watersheds identified. Furthermore, the report highlights critical gaps and inaccuracies in U.S. Energy Information Administration (EIA) data, including the total absence of reporting from the nuclear fleet. It argues that climate change and population growth will exacerbate these stresses, urging a shift toward low-water cooling technologies and low-carbon energy sources to ensure grid reliability and ecosystem health.

The report finds that U.S. power plants withdraw massive volumes of freshwater, with coal and nuclear plants being the most water-intensive. This demand contributes to water-supply stress in hundreds of watersheds and is exacerbated by droughts and heat waves. The authors highlight significant gaps and inaccuracies in EIA reporting and advocate for 'water-smart' energy choices, such as dry cooling and low-water renewables, to ensure energy reliability and water security.

The report analyzes six case studies—onshore wind in the U.S. and Spain, solar PV in the U.S. and Italy, a solar power tower in the U.S., and offshore wind in Denmark—to determine how policy impacts the cost of finance. It identifies seven policy impact pathways, finding that the duration of revenue support and revenue certainty are the most critical factors in reducing financing costs. The analysis shows that while most projects' costs and returns align with benchmarks, the Italian PV case experienced inflated costs and returns due to a rush to qualify for a Feed-in-Premium. The report concludes that policies reducing risk and providing revenue certainty are essential for attracting institutional investors and scaling innovative technologies.

The document is a citizen petition submitted to the EPA requesting the promulgation of rules under the Toxic Substances Control Act (TSCA) to address the lack of public and regulatory information regarding chemicals used in oil and gas exploration and production (E&P Chemicals). The petitioners argue that current regulatory gaps—including the 'Halliburton Loophole' and inadequate Material Safety Data Sheets (MSDS)—allow the industry to conceal toxic fluids that pose unreasonable risks to human health and the environment. The petition cites evidence of groundwater contamination, air quality degradation, and animal fatalities across several U.S. states. It specifically requests that the EPA mandate toxicity testing under TSCA section 4, require detailed reporting of chemical identities and volumes under section 8(a), call in records of adverse reactions under section 8(c), and require the submission of all existing health and safety studies under section 8(d).

The document outlines the financial hazards of investing in new or retrofitted coal plants in the U.S., citing competition from natural gas and renewables, rising fuel costs, and the likelihood of future carbon pricing. It highlights that coal is no longer the low-cost option it once was and that many existing plants are inefficient and ripe for retirement. The report suggests that the U.S. can replace most coal power with renewable energy, demand reduction, and natural gas within 15 to 20 years.