Posted: 28/11/2016 at 16:44
I have never understood the "fact" often quoted , that carbon dioxide levels have gone up. From my O level biology, I did experiments of altering growing conditions. Increasing the level of carbon dioxide leads to an increase in photosynthesis by plants, all else being constant. So if the plant grows faster, more carbon dioxide is used and the ambient level remains the same. Phytoplankton levels in the ocean "bloom" when the water stirs up and more carbon dioxide and nutrients are available, thus fixing the carbon dioxide into carbohydrates in various plants. The phytoplankton in the oceans, along with grass and forests suck up all excess CO2.