I was wondering about how much unchecked deforestation would have to occur before we tipped the balance and started using more oxygen than was being replenished by plants and trees.
Last I heard it was estimated that every day an area the size of Wales was being removed globally which sounds like a very large amount. This could be inaccurate now as it was a long time ago. Many companies now plant trees to offset carbon footprint or whatever but assuming they didn't how long would we have?
My question could be reduced to this - what area of land would need to be covered by forest to sustain life on earth without us all suffocating?
I imagine that this is a very simplistic view, it would probably cause global warming to accelerate first or the ecosystem to collapse and we'd all starve. I should say at this point that I am no scientist!