It responds even before any additional heating. Larger concentrations of CO2 speed plant growth pulling CO2 out of the atmosphere at a greater rate.
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When plants appeared and evolved on Earth, it is known for a fact that carbon dioxide (CO2) concentration was much higher than it is now. Then, the CO2 concentration was certainly above 1000 parts per million (ppm). Actually, the average CO2 concentration in outdoors air is about 400 ppm on the planet (not really true at your location). Thus, plants enjoy and are stimulated by breathing air with a higher CO2 concentration. That’s why so many indoor gardeners enrich their garden with CO2 during photosynthesis to supply the plants with this essential building material. Through photosynthesis, the carbon in CO2 is extracted and takes part in the building of leaves, stems, flowers and fruits. Proper CO2 concentration from early growing to fructification allows for faster maturation and larger yield.
http://www.novabiomatique.com/hydroponics-systems/plant-555-gardening-with-co2-explained.cfm
The article starts how stating it’s a scientific fact that CO2 absorbs sunlight and causes the earth to warm. That is repeated over and over by the left. It is also, total BS and has never been proven. CO2 is the POLITICAL CATALYST the frauds wanted but could never prove without manipulating the data. The new report is another HIDE THE DECLINE event by the left to pull the wool over our heads. I believe ZERO of anything these scammers have say.