shouldn't we plant billions of trees now? because

oxygen level since 1990

http://clivebest.com/blog/wp-content/uploads/2016/06/o2_plot.gif


and there are more than 2000 species of trees with edible fruits and nuts and berries



trees produce 21 Million calories per acre

trees produce oxygen and wealth and wildlife habitat and food and timber.



cows produce 1 Million calories per acre

cows produce

Methane which is 30 times higher effect heat-trapping greenhouse gas