President Donald Trump signs an executive order seeking to roll back the Obama administration’s Clean Power Plan. 

Trump’s Energy Department tells staff in its climate office not to use the phrases “climate change,” “emissions reduction,” or “Paris agreement.” 

Each year, Antarctica loses an amount of ice equal to one-third the volume of Lake Erie. 

After zeroing out the 2018 budget for the Great Lakes Restoration Initiative, the Trump administration is seeking to cut $50 million from its current funding in order to pay for a wall along the U.S./Mexico border. 

A wolf is spotted in Nevada for the first time in nearly a century. 

Interior Secretary Ryan Zinke ends the Obama administration’s ban on coal leases on federal land, calling it “a waste of money.” He also maintains that “there’s no such thing as clean energy.”   

EPA administrator Scott Pruitt ignores the advice of his agency’s experts and allows continued use of the neurotoxic pesticide chlorpyrifos. 

Pedestrian deaths jump 11 percent to nearly 6,000 in 2016. Researchers blame both motorists and walkers distracted by electronic devices. 

California adopts the strictest standards in the nation regulating emissions of the potent greenhouse gas methane. 

U.S. nuclear giant Westinghouse files for bankruptcy. The fate of four reactors the company currently has under construction is unclear. 

New Zealand’s Whanganui River is granted legal personhood. Days later, the same status is given to India’s Ganges and Yamuna Rivers. 

Yellowstone National Park culls 1,200 bison, the highest number since 2008. 

Briton Phillip Cullen is convicted of capturing, killing, and possessing specimens of the rare large blue butterfly, a protected species in the United Kingdom. He faces up to six months in prison.

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