Japanese researchers are closing in on a long promised energy dream, using only sunlight and water to generate clean hydrogen fuel with no smokestacks or power cables in sight. Their latest technology ...

Around 4.4 billion people worldwide still lack reliable access to safe drinking water. Newly designed, thin floating films that harness sunlight to eliminate over 99.99% of bacteria could help change ...

"Over an average residential roof," reads the Dewpoint website, "you can expect enough water per day to cover your basic water needs." That's in addition, mind you, to the rainwater you'd be ...