Telegraph: The phenomenon has been discovered in a variety of flora, ranging from tropical rainforests to British sugar beet crops. It means they are soaking up at least some of the billions of tons of CO2 released into the atmosphere by humans that would otherwise be accelerating the rate of climate change. Plants survive by extracting CO2 from the air and using sunlight to convert it into proteins and sugars. Since 1750 the concentration in the air has risen from of CO2 278 parts …