Four miles from the nearest plowed road high in Colorado’s Rocky Mountains, a 73-year-old man with a billowing grey beard and two replaced hips trudged through his front yard to measure fresh snow that fell during one mid-March day.

Schools in New Delhi were forced to close on Monday after heavy monsoon rains battered the Indian capital, with landslides and flash floods killing at least 15 people over the last three days. Farther north, the overflowing Beas River swept vehicles downstream as it flooded neighborhoods.

Snow falls thick as skiers shed their gear and duck into the Sundeck Restaurant, one of the first certified energy-efficient buildings in the U.S. — this one at 3,413 metres above sea level atop Aspen Mountain in Colorado.

The Environmental Protection Agency is expected to propose restrictions on harmful “forever chemicals” in drinking water after finding they are dangerous in amounts so small as to be undetectable. But experts say removing them will cost billions, a burden that will fall hardest on small communities with few resources.

The mottled bright green leaves of a pothos plant stood out against the flashy expanse of electric vehicles and smart products at the CES tech show in Las Vegas this year. This particular version of the familiar houseplant was bioengineered to remove 30 times the amount of indoor air pollutants of a typical house plant, according to Neoplants, the Paris-based company that created it.