"An enforcement breakthrough a decade in the making was unveiled in December: Three manufacturers of a sooty oil-based product known as carbon black had agreed to slash air pollution by thousands of tons each year. But there was a twist."

"Interior Secretary Ryan Zinke has appointed 15 representatives of the outdoor recreation industry to advise him on how to operate public lands, according to documents obtained by The Washington Post, including three people whom department officials flagged as potentially having a conflict of interest on the matter."

"The Environmental Protection Agency is considering a major change to the way it assesses scientific work, a move that would severely restrict the research available to it when writing environmental regulations."

"The Interior Department’s internal watchdog has opened an investigation into P. Daniel Smith, currently the top-ranking official at the National Park Service, for allegedly making a gesture involving his genitalia in the hallways of the department’s headquarter this year."

"Next month, a Silicon Valley engineer plans to head out on a snowmobile from Barrow, on the northern tip of Alaska, to sprinkle reflective sand on a frozen lake to try to stop it from melting."

"The U.S. Environmental Protection Administration plans to declare by April 1 that the Obama administration’s vehicle efficiency rules through 2025 are “not appropriate,” two officials briefed on the matter said Friday."

"Seven Democratic states on Friday threatened to sue the Trump administration for its delay in enforcing an Obama administration rule on air pollution from landfills."

"A group of climate skeptics who weighed in on climate lawsuits in California revealed their recent funding, and court documents show their donors are a mix of fossil fuel companies and conservative think tanks."