cutting global warming would make people healthier

Cutting global warming pollution would not only make the planet healthier, it would make people healthier too, newly released studies say.

Slashing carbon dioxide emissions could save millions of lives, mostly by reducing preventable deaths from heart and lung diseases, the studies show. They were published in a special issue of The Lancet British medical journal, released Wednesday.

The calculations of lives saved were based on computer models that looked at pollution-caused illnesses in certain cities. The figures are also based on the world making dramatic changes in daily life that may at first seem too hard and costly to do, researchers conceded.

Cutting carbon dioxide emissions would also reduce other types of air pollution, especially tiny particles that lodge in the lungs and cause direct health damage, doctors said. Other benefits could come from encouraging more exercise and less meat consumption, to improve heart health, researchers said.

"Reducing greenhouse gases not only helps save the planet in the long term, but it's going to improve our health virtually immediately," said Christopher Portier, associate director of the U.S. National Institute of Environmental Health Sciences. That agency helped fund the studies along with the Wellcome Trust and several other international public health groups.

"It's not 50 years from now, it's now," Portier said.

Instead of looking at the health ills causes by future global warming, as past studies have done, this research looks at the immediate benefits of doing something about the problem.

And for places like the United States, those advantages of reduced heart and lung diseases are bigger than the specific future health damage from worsening warming, Portier said.

Some of the benefits would only come from dramatic — and what could be considered unlikely — changes in everyday life, such as more bicycling and walking and reduced meat consumption. Other proposals studied are more concrete and achievable, such as eliminating cook stoves that burn dung, charcoal, wood and other polluting fuels in India and the rest of the developing world. All are part of a number of proposals examined by researchers that are aimed at cutting global greenhouse gas emissions, mostly from the burning of fossil fuels, by 50 percent by 2050.

"Here are ways you can attack major health problems at the same time as dealing with climate change," said lead author Dr. Paul Wilkinson, an environmental epidemiologist at the London School of Hygiene and Tropical Medicine.