Global Climate Policy Momentum Faces Mixed Signals
Climate change legislation is experiencing unprecedented momentum worldwide in 2025, with governments enacting aggressive measures to reduce greenhouse gas emissions and accelerate renewable energy adoption, according to environmental law experts.
"Climate change remains the defining issue of environmental law in 2025," reports [Lewis & Clark Law School]. "In the United States and globally, lawmakers are enacting measures designed to reduce greenhouse gas emissions and promote a faster shift toward renewable energy sources."
State Leadership Amid Federal Uncertainty
U.S. states are taking the lead in crafting climate policies, with new regulations around carbon markets, clean transportation, and energy storage creating complex legal frameworks. However, recent federal policy reversals are generating significant uncertainty.
President Trump's administration has announced the reversal of the Obama-era "endangerment finding," a scientific ruling that underpinned much U.S. environmental legislation, [BBC] reports. Legal experts predict this decision will face court challenges from environmental groups.
The Environmental Defense Fund estimates that removing greenhouse gas restrictions could result in an additional 7.5-18 billion tonnes of emissions by 2055 - three times current annual levels - potentially costing trillions of dollars [BBC].
International Progress and Challenges
Canada demonstrates both progress and ongoing challenges in climate action. The country released its latest climate plan in March 2022, following criticism from Canada's Commissioner of the Environment over 30 years of missed targets, according to [Climate Action Tracker].
Oil and fossil gas production represents Canada's largest emissions source at nearly one-third of total emissions. While policies like carbon pricing and methane regulations are expected to provide some offset, production increases in oil sands and LNG continue to drive emissions growth [Climate Action Tracker].
Canada's transport sector, representing nearly a quarter of national emissions, faces reduction targets of 9% below 2005 levels by 2030. The federal government has also proposed draft regulations to cut landfill methane emissions by 50% below 2019 levels by 2030, though these rules remain unfinalized [Climate Action Tracker].
Corporate Accountability and Legal Frameworks
The reversal of federal findings may paradoxically increase corporate legal exposure. "This may be another classic case where overreach by the Trump administration comes back to bite it," University of Maryland environmental law professor Robert Percival told [BBC].
Experts predict a surge in "public nuisance" actions against alleged corporate polluters, similar to lawsuits filed by states before 2011 federal regulations provided legal framework for emissions limits.
Path Forward
The [National Wildlife Federation] emphasizes that climate science demands cutting greenhouse gas emissions in half by 2030 and reaching net zero by 2050. As of 2019, 78 carbon pricing schemes were implemented or scheduled globally, with ten U.S. states pricing carbon pollution as an economic transition tool.
Environmental lawyers note that understanding how climate laws intersect with administrative, corporate, and international frameworks has become critical as legal complexity increases around sustainability and environmental protection efforts.