Go to the MATS-tresses – Health and environment advocacy groups filed a petition on Monday in the US Court of Appeals for the District of Columbia Circuit against the EPA's decision to repeal mercury air emissions regulations regarding some coal-fired power plants. The federal rule, filed on Feb. 24, repealed regulations from the Biden administration restricting hazardous air pollutant emissions from power plants, known as the 2024 Mercury Air Toxics Standards (MATS). The 20 non-profit petitioners include the Clean Air Council, the Environmental Defense Fund, the Sierra Club, the Natural Resources Defense Council, and the Conservation Law Foundation.

CDR conference call – The Government of Canada has scheduled an Offeror’s Conference on Apr. 17 as part of its carbon removal credits Request for Standing Offer, providing companies with an opportunity to seek clarification on the procurement process ahead of submitting bids. Interested participants must register by Apr. 10 by contacting the government via email.

Coal(ed) War – The US Department of War, formerly the Department of Defense, posted a request for coal-based power purchase agreements (PPAs) to fuel military installations, E&E News reported on Monday, as directed by US President Donald Trump. The request, active through May 15, follows a push by the Trump administration to boost demand for coal-fired power in the US. The request for proposals seeks US-owned assets that are connected to the grid for a PPA of up to 10 years.

Energy supply security remains exposed to a small number of routes, where physical blockages and 'paper chokepoints' such as insurance withdrawal can rapidly tighten markets and risk amplifying fossil-based vulnerabilities, concluded new analysis.

Major oil and gas and mining companies are prioritising operational emissions reductions while providing limited clarity on capital allocation and production shifts, according to new data covering companies worth more than $2.8 trillion.

Leather imported to the EU from Brazil and Paraguay continues to be tied to forest clearance, a non-profit has said as the European Commission gears up to review the commodities covered by its anti-deforestation law.

None of the world’s major steelmakers are currently ready to transition to near-zero-emissions production, with fresh investments in coal-based blast furnaces and minimal progress on “green iron” leaving the sector far off a Paris-aligned pathway, according to a new assessment released Tuesday.

RGGI Allowance (RGA) futures increased more than 6% over the previous week, approaching historic levels seen late last year above the $29 mark.

Biochar rebranding – The US Biochar Initiative said it has rebranded as the American Biochar Institute as part of a strategic shift to support industry growth. It will prioritise developing standards and markets for biochar while positioning itself as an independent, long-term resource for the sector. The group said it will continue convening stakeholders, including at its North American Biochar Conference in New Orleans on Nov. 16-18, 2026. It will focus market development on boosting demand for physical biochar across applications such as soil, fertilisers, construction, and urban infrastructure.

Over the past week, developments across Latin America showed forest-based carbon supply being channelled into different market pathways, with countries diverging on whether credits are exported, retained for domestic compliance, or supplied to voluntary markets.

Track the latest auction, emissions, and allocation data for the Western Climate Initiative (WCI), Regional Greenhouse Gas Initiative (RGGI), and Washington (WA) carbon markets.

CORSIA prices ticked higher last week, reflecting the market having found a wide trading range either side of $13, and there were signs that airlines are now readying to retire for compliance.

Canada housing emissions - Research published on Monday by the Institute for Research on Public Policy (IRPP) warned that improving energy efficiency is critical to addressing Canada’s housing affordability and emissions challenges. The paper by Pierre-Olivier Pineau argued that underused residential space, weak regulations, and slow uptake of existing technologies are undermining both cost and decarbonisation goals. He said that while residential emissions have declined since 2005, rising population and larger homes have driven higher energy use, offsetting efficiency gains. Pineau set out seven recommendations to place energy efficiency at the centre of housing policy, adding that the current “build more” mantra ignores underused housing space, weak energy rules, and the failure to deploy available technologies.

Two tech companies and a consultancy have collectively committed to purchase over 130,000 nature-based carbon removal credits from a US-based reforestation project.

Carbon capture capacity globally that begun operating or construction over the last year was over 10% higher than the preceding one, while storage capacity increased by around 25%, according to the International Energy Agency's (IEA) latest update.

A jurisdictional REDD+ (JREDD+) programme in Colombia has completed its public consultation period, bringing it closer to issuing (Core Carbon Principles) CCP-eligible voluntary carbon credits, the project developer said last week.

US airlines could face a hefty bill for 2024 emissions under the CORSIA international aviation offsetting scheme, but it remains uncertain whether their participation will be enforced, according to a new analysis.

Macao International Carbon Emission Exchange (MEX) has partnered with an environmental company to promote the international trade of Brazilian biodiversity credits, in a move that further signals its interest in this emerging market.

Oil price rises will channel a €24 billion windfall from European drivers to the pockets of fossil fuel majors by the end of the year, according to an analysis calling on the EU to tax these conflict-generated super profits.

A group of scientists have called for tougher action on methane emissions, including better monitoring and reporting, and for more countries to include methane reduction plans within their legally binding climate targets. 

A new book published Monday examines a landmark climate case against German energy company RWE, which may have set a precedent for holding major emitters legally liable for their contribution to climate damage.

A new guide that aims to help governments safely test emerging carbon market approaches has launched, as policymakers face growing pressure to unlock climate finance while maintaining market integrity.

Four key themes helped move agricultural soil carbon from a nascent category to the high-integrity climate solution that it is today.

Zefiro Methane Corp. and its founder have declared separate victories in their high-stakes legal battle for control of the offset project developer.