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Rooftop solar in the United States experienced rapid growth between 2008 and 2014, driven by a 45% decrease in household system prices from 2010 to 2014 and the rise of third-party ownership models. The technology provides significant environmental benefits, including zero carbon emissions and minimal water use during electricity generation, while supporting a domestic industry that employed over 170,000 people by 2014. Growth is further sustained by federal and state policies such as net metering, feed-in tariffs, and a 30% federal investment tax credit.

Synapse Energy Economics analyzes and debunks claims made by NERA Economic Consulting regarding the costs of a proposed 65 ppb ozone standard. Synapse finds that NERA inflated compliance costs by over 700% through flawed assumptions on emission reduction requirements, an inappropriate use of 'cash for clunkers' data to price unknown controls, and significant mathematical errors. Synapse's re-analysis suggests annualized costs of $13.6 billion to $21.6 billion, far below NERA's $155 billion estimate. Additionally, the document argues that NERA's prediction of 1.4 million 'job-equivalent' losses is based on a 'black box' model that does not predict actual unemployment and ignores the economic benefits of pollution control investments.

The report examines how California's local groundwater sustainability agencies (GSAs) can develop effective measurable objectives to avoid 'undesirable results' and achieve sustainable yield by 2040. It outlines six characteristics of effective objectives—including clear baselines, quantitative thresholds, and adaptive management—and recommends that the state provide a common framework, identify consistent data sources, and define shared assumptions for modeling sustainable yield.

Earthjustice, representing a coalition of environmental and community groups, urges the City of Oakland to reject the development of a coal export terminal at the former Oakland Army Base. The letter asserts that the project would disproportionately burden the low-income, predominantly African American community of West Oakland with particulate matter and diesel pollution, while violating California's greenhouse gas reduction goals. It argues that proposed mitigations, such as covered rail cars, are ineffective and that the project is an economic risk due to declining global coal demand. Finally, the document claims the project lacks necessary environmental review under CEQA and NEPA and that the City possesses the legal authority to ban the terminal to protect public health.

The report argues that smart growth—characterized by compact, walkable, and transit-oriented development—is essential for California to meet its 2030 climate targets. By combining aggressive energy technology deployment with 'More Compact' or 'Infill Focus' land use scenarios, the state could achieve statewide emissions reductions of 40-41% below 1990 levels. Beyond carbon mitigation, the study quantifies significant co-benefits, including billions of dollars in household and infrastructure cost savings, improved public health outcomes, and the conservation of hundreds of square miles of land.

The report argues that achieving sustainable groundwater management in California requires the establishment of clear, quantitative measurable objectives to avoid 'undesirable results' such as land subsidence and seawater intrusion. It advocates for an adaptive management approach involving clear baselines, quantitative thresholds, and protective triggers. The authors propose a six-step preliminary framework for setting thresholds and recommend that the state develop a common framework to ensure consistency in data, assumptions, and metrics across different groundwater sustainability agencies.

A group of Ph.D. researchers and scholars call upon Governor Brown and California legislators to pass SB 32 and SB 350. The signatories argue that human activity is the primary cause of global warming and that California is already experiencing climate impacts such as increased wildfires and extreme heat waves. They advocate for three specific targets: reducing heat-trapping emissions to 80% below 1990 levels by 2050, increasing renewable electricity to 50% by 2030, and reducing transportation petroleum use by 50% by 2030.

The analysis finds that California can reach a 50 percent renewable electricity mix by 2024 using existing technology. While increasing the Renewables Portfolio Standard to 50 percent would reduce greenhouse gas emissions by 22 percent without further grid investment, implementing advanced grid management tools like storage and demand response could increase that reduction to 27 percent and significantly decrease renewable energy curtailment.

The paper examines how different DER ownership models can be used to integrate cost-effective technologies into outdated regulatory frameworks. It argues that no single model is universal, but each can work if the value proposition aligns with the public interest and utilizes an adaptive approach prioritizing fair compensation and transparency. Utility-owned models are effective for early adoption and public goals but risk cost overruns and market power issues. Third-party and customer-owned models excel when they have transparent access to the full value of DERs through dynamic rate design or competitive markets.

The report analyzes the impact of raising California's Renewables Portfolio Standard (RPS) to 50 percent by 2024. It finds that while this transition reduces GHG emissions and production costs, it increases renewable curtailment, primarily driven by downward reserve and regional generation requirements. The study concludes that non-fossil flexibility—including electricity storage, advanced demand response, and allowing renewables to provide reserves—is significantly more effective at reducing curtailment and emissions than increasing the flexibility of natural gas power plants.

The United States generates over 250 million tons of municipal solid waste and 9 trillion gallons of wastewater annually, yet recovers less than 18 percent of the potential 10.5 million metric tons of biomethane available. Current landfill systems are inefficient, leading to significant fugitive methane emissions, while many wastewater treatment facilities lack anaerobic digesters or flare excess biogas. The document advocates for a shift toward organic waste diversion and anaerobic digestion, which can result in negative lifecycle emissions. It highlights the potential for waste-derived fuel to power 10.4 million cars or 13.7 million homes and suggests that the EPA's designation of biogas-derived electricity as a renewable biofuel could generate 90 million renewable identification numbers (RINs) annually to support electric vehicle infrastructure.

The study utilizes integrated basin-scale models to analyze the water-energy-climate nexus in Sacramento, California. It finds that hot dry years, characterized by a 4C temperature increase and 25% precipitation decrease, would lead to a more than 35% increase in regional electricity imports due to constrained local power production.

The report presents seven 'deception dossiers' containing approximately 85 internal documents that reveal how fossil fuel companies and trade associations intentionally spread climate misinformation. It details tactics such as the secret funding of contrarian scientists, the creation of 'astroturf' grassroots groups, and the use of forged letters to Congress to undermine climate science and delay the transition to clean energy.

The Union of Concerned Scientists argues that the American Chemistry Council (ACC) systematically obstructs science-based chemical regulations to protect industry profits. The report details the ACC's use of 'revolving door' lobbyists, political donations to key congressional committees, and the promotion of flawed industry-funded studies to delay regulations on substances like BPA, flame retardants, and formaldehyde. It further examines the ACC's efforts to weaken the Toxic Substances Control Act (TSCA), limit public access to chemical facility risk data, and influence international trade agreements like the TTIP to prevent the regulation of endocrine disruptors.

The policy brief addresses the 'predictability problem' of public climate finance, where funding is often subject to the political caprice of national budgeting processes. It proposes three plans to secure more reliable funding: 'Plan A' involves international levies on aviation and maritime emissions; 'Plan B' suggests earmarking domestic sources like financial transaction taxes or air passenger duties; and 'Plan C' proposes sub-national contributions from entities like California and Quebec. The author advocates for a 'Development Gold Standard' where governments set aside 2% of carbon instrument revenues for the most vulnerable countries, specifically targeting the under-funded Least Developed Country Fund (LDCF).

The report outlines a toolkit for local governments to manage the rapid expansion of unconventional oil and gas development, such as hydraulic fracturing. It details regulatory options like zoning and setbacks, non-regulatory strategies including community engagement and contractual agreements, and fiscal tools such as severance taxes and road maintenance agreements. The document emphasizes the challenge of state-level preemption and the need for local officials to act as 'honest brokers' between industry and concerned residents.

The United States can meet its target of reducing greenhouse gas emissions by 26–28 percent below 2005 levels by 2025 through a combination of existing federal laws and state actions. The report proposes a 10-point action plan focusing on the power sector, energy efficiency, HFCs, and methane reduction. For deeper reductions beyond 2025, the authors argue that new legislation, such as a carbon price, could reduce emissions by 40–42 percent by 2030 and 50–53 percent by 2040 without sacrificing robust economic growth.

The City of Houston, Harris County Attorney, and Air Alliance Houston argue that the district court abused its discretion by denying civil penalties and injunctive relief despite finding nearly one hundred actionable Clean Air Act violations at Exxon's Baytown complex. The brief contends that the court misapplied the 'seriousness' and 'economic benefit' factors of the Act, ignoring the public health risks of ozone and carcinogens in the Houston-Galveston-Brazoria Ozone Nonattainment Area. It further argues that the court's narrow interpretation of 'repeated' violations allows polluters to evade liability by frequently changing numeric emission limits.

The policy brief argues that current carbon pricing mechanisms, which use free allowances to prevent carbon leakage in industrial sectors, eliminate the price signal for mitigation beyond primary production efficiency. To address this, the authors propose 'Inclusion of Consumption,' where a consumption charge is levied on carbon-intensive materials (such as steel, aluminum, and clinker) based on benchmark emission values and the carbon price. This charge would apply to all domestic consumption regardless of origin, making it compatible with WTO law. The mechanism would use duty suspension arrangements to track materials through the value chain, with the charge becoming due only when the good is released for consumption. The brief notes precedents in Asia (South Korea, China, Tokyo) regarding electricity consumption and discusses potential implementation in Europe and the United States.

The report finds that while renewable energy auctions are generally cost-effective and fair in project allocation, they often suffer from low deployment due to poor risk management. By analyzing 20 global auctions, the study identifies that project risks (such as transmission and land acquisition) have a greater negative impact on deployment than auction-specific risks. The authors recommend a 'controlled environment' for introducing wind energy auctions in India, including pre-identified sites and resource assessments, alongside the use of strong penalties for non-commissioning and payment guarantee mechanisms to ensure financial viability.