It's been an intractable problem - the dirtiest diesel trucks are often owned by drivers who can't afford to replace or even maintain them. But the Sea Port of Los Angeles thinks it has a solution. Living on Earth's Ingrid Lobet reports.
One geologist thinks he has the answer for storing massive amounts of carbon dioxide: turn it into the stuff of seashells. The idea is to use a rock found in the Earth that absorbs the greenhouse gas. On Living on Earth.
The U.S. recycles almost all car batteries, but that's not true in many developing countries. Sifting through waste to retrieve lead is a major source of income, and lead exposure, for many people in poorer countries. Living on Earth reports.
Entrepreneurs who want bring offshore wind farms to the United States are facing staunch opposition and difficult economic calculations.