cleaner

However, the heavy dependence on coal within China's power grid substantially increased overall emissions during production compared with the cleaner energy sources used in North America.

Denmark inaugurated one of Europe's few low-carbon hydrogen plants on Monday, a sector touted as a key to cleaner energy but plagued with challenges.

“We are developing this technology to increase market share for rail and to make freight transportation safer and cleaner.”

So too are the solutions -- cleaner fuel, better waste management and stricter enforcement of rules.

A new profession has emerged reflecting that statistic: cleaners who are called in to tidy up homes after their occupants, most of whom lived alone, have died.