food webs

Road Salt Pollution Levels Deemed Safe in U.S. and Canada May Not Protect Freshwater Ecosystems Enough

Road Salt Pollution Levels Deemed Safe in U.S. and Canada May Not Protect Freshwater Ecosystems Enough

Using salt to clear icy roads may be an effective winter safety measure, but excess salty meltwater can wreak havoc on freshwater ecosystems and drinking water resources. In a new study, researchers show current water quality guidelines in North America and Europe are not enough to prevent dangerous levels of salinization. The findings were published last month in the Proceedings of the National Academy of Sciences.

Our oceans are hotter than ever. Scientists say they worry about what that means for our future

Our oceans are hotter than ever. Scientists say they worry about what that means for our future

Amid another record warm year for the planet, one of the most dramatic and alarming changes occurred in our oceans, according to the National Oceanic and Atmospheric Administration (NOAA). They are the warmest they've been in recorded history. In fact, the ocean heat has been topping its own record annually for the past seven years, with last year's record set despite the absence of El Niño — a warming in part of the Pacific Ocean that tends to drive up global temperatures.