Harvard scientists are teaming up with sustainability officers and landscaping experts to test a new fertilizer that won’t wash into water supplies.

A marijuana derivative called cannabidiol, or CBD, has begun making its way into supplements and even into foods, a use that runs afoul of an FDA designation of the compound as a prescription drug. A Harvard Medical School associate professor says CBD’s tangled legal status may provide an opportunity not only to clear up its status, but to bring clarity to the entire supplements industry.

Researchers have discovered why the North Atlantic and Northeast Pacific appeared to warm twice as much as the global average, while the Northwest Pacific cooled over several decades.

A recent study shows that nitrous-oxide emissions from thawing Alaskan permafrost are about 12 times higher than previously assumed. About a quarter of the Northern Hemisphere is covered in permafrost, which is thawing at an increasing rate. And, even though researchers are monitoring carbon dioxide and methane, no one seems to be monitoring N2O, the most potent greenhouse gas.