A previously unknown “super-colony” of more than 1.5 million Adélie penguins is discovered in Antarctica. 

The extent of Arctic sea ice in February was at a record low for that month.

There is no sign of newborn North Atlantic right whales this breeding season.

The head of the EPA scientific advisory board says, “I really don’t know” if human-caused greenhouse gases cause climate change.

Energy Secretary Rick Perry calls moving away from fossil fuels “immoral.”

Interior Secretary Ryan Zinke, in a speech to oil and gas executives, falsely claims that wind turbines kill 750,000 birds a year and that wind’s carbon footprint is similar to that of fossil fuels'.

Villagers in the Batang Natal subdistrict of North Sumatra kill a critically endangered Sumatran tiger because they believe it to be a siluman, or shapeshifter.

Honduran police arrest an executive from a dam-development company, believing him to be the “intellectual author” of the March 2016 assassination of environmental activist Berta Cáceres. 

Women who use spray-cleaning products at least once a week show accelerated decline in lung function over those who do not. 

Of the first six crashes involving self-driving cars in California in 2018, two involved unprovoked attacks by humans.

Uber is transporting goods via self-driving trucks across Arizona and has been doing so since November 2017.   

The EPA awards a contract to the business partner of the chief of Scott Pruitt’s personal security detail; the contractor was hired to sweep administrator Pruitt’s office for bugs. 

Interior Department documents obtained by the New York Times show that opening up land for oil and gas drilling was central to the agency’s decision to shrink the Bears Ears National Monument in Utah. Similarly, allowing access to coal deposits was central to its decision to reduce the Grand Staircase–Escalante National Monument by half. 

Utah Republican state representative Mike Noel drops his bid to rename a southern Utah road the Donald J. Trump Utah National Parks Highway. 

Ryan Bundy, who led the occupation of Oregon’s Malheur National Wildlife Refuge, will run for governor of Nevada. 

Tony Tooke, head of the U.S. Forest Service, steps down after allegations of sexual misconduct. 

Peter Wright, President Trump’s nominee to head the EPA’s solid waste division (which includes authority over Superfund sites), is managing counsel at Dow Chemical, which is responsible for more than 100 Superfund sites. 

The Ninth Circuit District Court allows the suit by 21 young people challenging the government’s lack of action on climate change to proceed. The Trump administration had sought to have the suit thrown out.