AFP: Deepening its cut in greenhouse-gas emissions from 20 percent to 30 percent would coincidentally save the European Union (EU) tens of billions of dollars in health costs, campaign groups said on Tuesday. The cuts aim at heat-trapping gases such as carbon dioxide (CO2) but would also improve air quality as a side effect, according to a study commissioned by the Brussels-based Health Care Without Harm and the Health and Environment Alliance. It would reduce smog and other …