They provide oxygen to us. the way they do that is "Through photosynthesis, plants use the energy from sunlight to produce sugar, which cellular respiration converts into adenosine triphosphate (ATP), which all living things use for energy. Oxygen is a biproduct of this chemical process." "As for how many trees are cut down each year, the 2005 report concludes that primary forest area (as opposed to plantations)was reduced globally by 60,000 square kilometers per year (about the size of Ireland; Note that this data is incomplete due to a lack of available data from many countries who do not monitor such change. As to the “number of trees” this represents. it’s impossible to get an accurate count. Tree density in primary forests varies from 50,000-100,000 trees per square km, so the math would put this number at 3 billion to 6 billion trees per year." (thanks to a vary smart man fo that info) they may not know how many that really was but the numbers they're estimating are huge! this just needs to stop. we have to find a way to save our planets resources. there has to be a better way.
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