alternative enery

Oil is an expensive resource that is rapidly becoming harder to find. Eventually, we are going to have to find a renewable fuel source to replace it. These scientists think they already have—algae. (3:08 min)

Researchers say algae may be the next alternative to oil. The AP’s John Mone reports. (3:11 min)

China is hoping to overthrow its reputation as one of the one of the most polluted countries in the world. (2:59 min)