Climate diplomats said they want to see an ambitious U.S. commitment to cut emissions this decade and a diplomatic push to convince others to follow suit.

About one hundred wildfires have burned an area nearly as large as the state of New Jersey across the U.S. West, creating smoke that gave California, Oregon and Washington state the worst air quality levels in the world.

Andrew Wheeler said the agency was moving back toward an approach that had long promoted economic growth as well as a healthy environment and drawn bipartisan support.