which one is right, global warming,more carbon dioxide in air?

Question

this is, (A)benificial to greenery (B) harmfull to greenery ,if possible please give reasons

Answer 1

CO2 is beneficial. But global warming will also cause drought in the mid-lattitudes, which is harmful. And changing temperature means crops will grow better in different areas, so they'll have to be moved.

Overall, scientists think there will be some benefits to agriculture in the short term in some places, and serious harm later.

http://www.ipcc.ch/SPM6avr07.pdf

Answer 2

Plants and trees are necessary for life. They clean our air of Carbon Dioxide.
Plants take it in and give off Oxygen. Therefore the more green plants we have on this planet the better our Air will be, cleanier and better for our health.
The more Carbon Doixide we have in the Air the more Plants we need and with the rapid rate we are losing Trees by clear cut and deforestation, we lose. If we take down a tree we must plant two or three in its place. Because smaller young trees do not do the same work as larger more mature trees.
Global Warming can in effect cause Air Problems and kill vegestation. We need to halt it in its tracks. But it may already be too late.

Answer 3

CO2 is the first step of the worlds air recycling process. The plants take in the CO2 and give us the O2 and hold on to the C . The present CO2 levels have increased very slightly but the plants use it to make there food so it accelerates their growth so if they don't recycle it all they will soon.

Answer 4

a
co2 is needed by plants
but the heat will change their physiology and they wont function properly