Planting trees could slow global warming, but it won’t be cheap

Preserving and planting trees, especially in the tropics, could reduce carbon dioxide emissions by six gigatons a year from 2025 to 2055. The associated costs, however, could be as high as $393 billion a year. Study co-author Brent Sohngen is a professor of Environmental Economics at The Ohio State University. "There is a significant amount of carbon that can be sequestered through forests, but these costs aren't zero," said Professor Sohngen. The overall CO2 reduction predicted by 2055 would make up about 10 percent of the total …