More than could fit on the surface of Earth.
1. Depends first, on whether you want an scientifically honest answer, or fossil fuel industry propaganda and conspiracy theory BS.
2. And second, it also depends on what you mean by "reduce global warming." As you might learn, if you ever take high school science, or learn basic logic, to QUANTIFY the number of plants, you'd need to specify the AMOUNT (or at least the average amount) of carbon per plant, and to measure that against "reduce global warming" you'd have to quantify the AMOUNT of carbon (or CO2) to be reduced (enough to stabilize the global emissions rate from anthropogenic sources, or the total ppm in air or what?)
I suggest you try the question later, after you've done more of the high school science homework you never did before.
Well someone calculated a trillion trees, but I don't believe that, anyway it is happening now, our plant biomass is increasing even taking into account deforestation.
http://wattsupwiththat.com/2011/03/24/th...
and do not forget biomass also means soil biomass which is not recorded by satellite as much 26% of plant biomass is underground,
Our earth will cope just fine, it has before it will again, remember we are not making Co2 we are just converting it from stored sources, and earth just converts it back, we still have the same amount of carbon and oxygen we always had.
By the way, what global warming? the 0.78 degrees in the last century or what
We may need thousands of rain forests to reduce global warming.
about 7 times the amount currently on land (according to my forestry professors in 2011).
You can not calculate that. It will take more than just planting a few trees and plants.
There is no global warming.
A lot of burning is going on...
