A rare, 170-year-old Bunya pine tree in Tasmania is chopped down after its 13-pound cones damage cars parked beneath it.

The last captive orca is born at SeaWorld in San Diego. Its mother was pregnant in March 2016, when the park announced the end of its captive-breeding program.

Walmart seeks to reduce the greenhouse emissions in its supply chain by 1 gigaton by 2030—an amount equivalent to that released by 211 million cars in a year.

The EPA solicits suggestions from the public for what environmental rules and regulations it should eliminate. The agency also starts winnowing its workforce toward an eventual reduction of 3,200 jobs.

In what’s being called a case of “river piracy,” warming temperatures in the Canadian Arctic divert the course of runoff from the Yukon's Kaskawulsh glacier over the course of four days, dewatering the Slims River, which flows north to the Bering Sea, and feeding instead the Alsek, which empties south into the Pacific. 

A coal-mining company in Kentucky announces Appalachia’s first large-scale solar project on the site of a reclaimed mountaintop-removal strip mine.

Oklahoma’s governor says she will sign a bill to repeal the tax credit for wind power that has made her state the third-largest wind-power producer in the nation. 

Denmark’s Dong Energy will build two large wind farms off the coast of Germany without any government subsidies. It is counting on increased production from larger, more powerful turbines, and on higher future energy prices. 

A methane blowout at BP’s Prudhoe Bay oil field causes a remote well to spout an unknown amount of crude oil and methane. BP could not identify the cause of the blowout, which comes as the Trump administration is preparing an executive order to reverse the Obama administration’s ban on offshore oil drilling in Arctic waters. 

Marijuana dispensaries in Colorado must be at least 1,000 feet away from schools, but Colorado state senators kill a measure that would have applied the same limit to oil wells.

This is a weekly edition of "Up to Speed," an environmental news roundup for short attention spans. For more, go to sierraclub.org/uptospeed.