Search Climate Insights Directory

District energy systems provide centralized heating and cooling to multiple buildings via underground pipes, utilizing sources such as combined heat and power (CHP) plants, waste heat, and renewables. In the United States, over 700 such systems exist, offering benefits like reduced fuel consumption, lower peak electrical demand, and decreased greenhouse gas emissions. While high upfront infrastructure costs can be a barrier, examples from universities and city centers demonstrate significant energy savings and carbon reductions.

The Keystone XL pipeline, proposed by TransCanada to transport tar sands oil from Canada to Houston, faces significant opposition from U.S. lawmakers, grassroots organizers, and federal agencies. The EPA gave the State Department's draft Environmental Impact Statement a failing grade for omitting global warming impacts. Concerns include the potential contamination of the Ogallala Aquifer in Nebraska and the higher carbon emissions associated with tar sands oil compared to conventional oil. The document highlights controversies surrounding Secretary of State Hillary Clinton's perceived bias and her ties to TransCanada's lead lobbyist, Paul Elliott.

The Clean Air Task Force (CATF) supports the EPA's proposed Transport Rule to replace the judicially invalidated Clean Air Interstate Rule (CAIR) but argues it should be strengthened to further reduce sulfur dioxide (SO2) and nitrogen oxides (NOx). CATF specifically advocates for the passage of S. 2995, the Clean Air Act Amendments of 2010 (CAAA of 2010), asserting it would deliver greater emissions reductions, save more lives, and provide more regulatory certainty than the Transport Rule alone. The testimony details the severe health and environmental impacts of power plant emissions, including premature death from fine particulate matter, acid rain damage to eastern ecosystems, and ozone-related crop losses.

The document details the methodology for creating emissions inventories using top-down and bottom-up approaches, categorizes pollution sources into stationary, area, mobile, and natural, and evaluates various technical control devices and policy strategies to reduce air pollution in urban Asian environments.

The report analyzes the vulnerability of the Gulf Coast's diverse ecosystems—from upland forests to coral reefs—to rising temperatures and sea levels. It highlights that while climate change poses significant threats to water resources, biodiversity, and public health, current human activities like shoreline development and water engineering remain the primary drivers of ecological change. The authors advocate for a three-pronged strategy of mitigation, minimization of human impacts, and adaptive management to safeguard the region's economic and natural heritage.

The report analyzes the health impacts of ground-level ozone in the Eastern United States, specifically the OTAG region, using 1997 monitoring data and epidemiological concentration-response functions. It estimates that ozone exposure led to 53,000 respiratory hospital admissions, 16,000 cardiovascular hospital admissions, and 159,000 total respiratory emergency room visits during the April-October 1997 season. The analysis highlights significant uncertainty regarding mortality and chronic illness, which were excluded from the quantitative estimates. The findings are compared with a study by the American Lung Association, showing reasonably close results for respiratory admissions.

The report analyzes the energy-intensive nature of the Texas transportation system, which is heavily dependent on petroleum. Using the LEAP/EDB model, it compares a Reference Scenario (status quo) against four alternatives: Rollback, Moderate, Aggressive, and Visionary. The findings indicate that while the Reference Scenario projects a 44.2% increase in energy use by 2020, the Visionary Scenario could reduce energy consumption to levels below 1994 totals. The study emphasizes that aggressive pricing and technological shifts are necessary to achieve significant energy savings and air quality improvements.

The report examines the transition of global shipping to zero-carbon fuels, specifically hydrogen and ammonia. It identifies a 'chicken-and-egg' dilemma where infrastructure investment depends on demand, and demand depends on supply. The analysis evaluates several major ports—including Rotterdam, Jebel Ali, Los Angeles, Houston, Tokyo, Shanghai, and Hong Kong—based on their trade connectivity, technological capacity for fuel production, and policy support. It concludes that while blue hydrogen is currently the most realistic large-scale production pathway, green hydrogen is promising in regions with cheap renewables like the UAE and Australia. The report recommends establishing trans-oceanic coalitions, partnering fuel suppliers with shipping companies along major trade routes, and leveraging public finance to de-risk infrastructure investments.

The document outlines federal grants and tax credits from the Inflation Reduction Act (IRA) and Infrastructure Investment and Jobs Act (IIJA) to support the deployment of electric vehicle (EV) charging and hydrogen fueling infrastructure. It details specific funding categories including charging/fueling, supply chain development, emissions monitoring, and state planning, while highlighting active zero-emission freight corridor projects along I-95, I-80, and I-10. The guide also provides a three-phase strategic framework for states to establish priorities, communicate with stakeholders, and monitor performance to maximize the use of these federal resources.

The document examines the role of hydrogen fuel cells in decarbonizing heavy-duty trucking, noting their efficiency advantage over internal combustion engines and suitability for long-haul operations compared to battery electric vehicles (BEVs). It identifies California as the primary region for adoption due to supportive policies, but highlights critical barriers including high hydrogen costs, infrastructure gaps, and the financial instability of FCEV startups like Nikola and Hyzon.

The HyVelocity Hydrogen Hub is projected to create 45,000 direct jobs, including 35,000 in construction and 10,000 permanent positions. The initiative involves seven major projects located in areas such as the Golden Triangle, Corpus Christi, and Louisiana. The hub is supported by a wide consortium of industry sponsors, including AES Corporation, Air Liquide, Chevron New Energies, ExxonMobil Low Carbon Solutions, MHI Hydrogen Infrastructure (MHI H2I), and Orsted, with GTI Energy serving as the prime consortium representative and administrator.

The document argues that integrating public health and equity into climate policy can broaden political support and save lives, estimating that low-carbon policies could avoid 1 million American deaths annually. It proposes a roadmap of legislative and agency actions, including banning natural gas expansion, transitioning to regenerative agriculture, and electrifying public transit, to align the U.S. with the Paris Agreement's 1.5C target. The brief emphasizes that health co-benefits could offset 10% to 41% of U.S. mitigation costs.

The document alleges a systemic pattern where oil and gas companies fund police and political entities to silence opposition to fossil fuel infrastructure. It highlights the Line 3 pipeline in Minnesota, where Enbridge is permitted to invoice police for security, and notes a trend of increasing criminalization of climate protests across the US, UK, and Australia. The text also cites historical allegations of corporate-backed state violence by Shell and Chevron in Nigeria, and Frontera Energy in Colombia.

The document asserts that the Trump administration has systematically undermined scientific integrity and rolled back environmental and public health protections, exacerbating existing inequities for marginalized communities. It highlights a decrease in EPA criminal enforcement, the suppression of health data, and the erosion of social safety nets as key drivers of increased risk for low-income and minority populations.