"David H. Koch, an industrialist who amassed a multibillion-dollar fortune with his brother Charles and then joined him in pouring their riches into a powerful right-wing libertarian movement that helped reshape American politics, died on Friday at his home in Southampton, N.Y. He was 79."

"The company behind the controversial Keystone XL pipeline has won a major victory in Nebraska, where environmental activists, two Native American tribes and some local landowners had sought to derail its construction. The state's Supreme Court on Friday ruled unanimously in favor of an alternate route proposed by TC Energy, formerly known as TransCanada."

"Environmentalists scored a major win today as a federal appeals court rejected industry challenges to Obama-era ozone standards and ordered EPA to take a closer look at one part of the requirements that green groups deemed too lenient."

"NEWARK — In the year after receiving test results showing alarming levels of lead in this city’s drinking water, Mayor Ras Baraka of Newark made a number of unexpected decisions."

"Federal scientists pulled no punches in their report: The Trump administration’s plan to send more water to San Joaquin Valley farmers would force critically endangered California salmon even closer to extinction, and starve a struggling population of West Coast killer whales. But the scientists’ findings weren’t adopted, nor were they released to the public."

"Leaders of the Group of Seven nations said Sunday they are preparing to help Brazil battle fires burning across the Amazon region and repair the damage as tens of thousands of soldiers got ready to join the fight against blazes that have caused global alarm."

"A lot of money will soon be flowing into California communities with contaminated drinking water thanks to the new Safe and Affordable Drinking Water Fund."

"Countries voted overwhelmingly on Thursday to regulate international trade in giraffes, an endangered species, and in their skins and other parts, overcoming objections by southern African states and drawing praise from conservationists."

"The US interior secretary, David Bernhardt, is promoting a fossil fuel project for which his former employer, a lobbying firm, is a paid advocate, e-mails obtained by the Guardian suggest."

"Senator Bernie Sanders on Thursday released a $16.3 trillion blueprint to fight climate change, the latest and most expensive proposal from the field of Democratic presidential candidates aimed at reining in planet-warming greenhouse gases."