Fighting Fire with Sound—No Water Required. That story and more on H2O Radio’s weekly news report.

Headlines:

President Trump pulled the U.S. out of 66 international organizations and agreements, including ones to combat climate change and address the oceans, seabed, and renewable energy.

A new study has found that Earth’s oceans are now the hottest they’ve ever been since measurements began in 1960.

A California company is using acoustic waves to douse flames—no chemicals, suppressants, water, or power needed.

Jellyfish may be brainless, but they’re more similar to us than you think.