Predicted warming for the end of the century. Panels A-F involve low, medium and high carbon dioxide increases. Panels G and H are based on greenhouse gas concentrations stabilized as of 2000. Â© Science
One of the world's largest insurers warned today of the economic costs of global warming.
"Climate change will significantly affect the health of humans and ecosystems and these impacts will have economic consequences," concludes a new study cosponsored by Swiss Re, a global re-insurance company.
The research was done by the Center for Health and the Global Environment at Harvard Medical School and also sponsored by the United Nations Development Program.
Costs already rising
In the report, 10 case studies outline current effects of climate change, from infectious diseases such as malaria and West Nile virus to extreme weather events such as heat waves and floods. Changes to forests, agriculture, marine habitat and water were considered.
Economic implications as well as possible near-future impacts are projected for each case.
Lyme disease is increasing in North America as warmer winters allow ticks to proliferate, the study concludes. Ragweed pollen growth, stimulated by increasing levels of carbon dioxide, may be contributing to the rising incidence of asthma, the scientists say.
"We found that impacts of climate change are likely to lead to ramifications that overlap in several areas including our health, our economy and the natural systems on which we depend," said Dr. Paul Epstein, the study's lead author and Associate Director of the Center for Health and the Global Environment at Harvard Medical School. "Analysis of the potential ripple effects stemming from an unstable climate shows the need for more sustainable practices to safeguard and insure a healthy future."
Swiss Re is a global re-insurance company, meaning it assumes the risk from the smaller insurance companies that individuals and businesses deal with. It has been warning about the costs of climate change since at least 2003.
"Whereas most discussions on climate change impacts hone in on the natural sciences, with little to no mention of potential economic consequences, this report provides a crucial look at physical and economic aspects of climate change," Jacques Dubois, Chairman of Swiss Re America Holding Corporation. "It also assesses current risks and potential business opportunities that can help minimize future risks."