On July 22, U.S. Environmental Protection Agency (EPA or the Agency) Administrator Andrew Wheeler signed an advance notice of proposed rulemaking (ANPR) to promulgate regulations governing carbon dioxide and nitrous oxide (collectively, GHGs) emissions from American aircraft under the Agency’s Clean Air Act (CAA) section 231 authority. This is the first such rule from the Agency covering aircraft GHG emissions. The ANPR proposes GHG standards for U.S. aircraft that are consistent with those adopted by the International Civil Aviation Organization (ICAO) in 2017, which EPA and the Federal Aviation Administration helped to develop. EPA does not anticipate that the proposed standards will reduce fuel burn or GHG emissions beyond the current baseline because existing or expected aircraft fuel efficiency technologies that formed the basis of the 2017 ICAO standards already demonstrate technological feasibility.
On July 2, 2020, in Sierra Club v. United States Environmental Protection Agency, the U.S. Court of Appeals for the Tenth Circuit rejected the Environmental Protection Agency’s (EPA) interpretation of the scope of its obligations to review permits under Title V of the Clean Air Act (CAA). The court found that the plain language of EPA’s regulations requires EPA to review whether a state-issued Title V permit complies with all applicable CAA requirements, not only the requirements the state included in the permit. The issue may end up in the U.S. Supreme Court, as it diverges from a recent ruling by the Fifth Circuit.
On June 26, 2020, a federal district court ruled that the U.S. Environmental Protection Agency (EPA) is not required to perform a risk assessment every time it revises its technology-based standards for a hazardous pollution source. Rather, the EPA is required to conduct a risk assessment only in connection with its initial adoption.