Green Gas

Green activists don't speak for the trees:

Via Earth.com (emphasis added): The amount of carbon dioxide (CO2) in the atmosphere has been increasing rapidly, leading to severe climate consequences. However, researchers at Wageningen University have identified an unexpected benefit of rising CO2 levels: tropical trees have become more efficient at photosynthesis over the past century… The study revealed that the increase in CO2 concentrations has enabled tropical trees to enhance their carbon-absorbing capabilities… Since higher CO2 levels reduce the occurrence of photorespiration, trees can use more energy for growth and maintenance. This is not only beneficial for trees but also for humans, as increased photosynthesis means that trees absorb more CO2 from the atmosphere. Eat your heart out, Al Gore.

It's an inconvenient study...