Quote:
Originally Posted by italk2u
The problem with that is that the weeds are what make the oxygen in the first place. No weeds, no oxygen.
oxygen depletion only happens when the weeds die through lack of sunshine(covered by snow) and then regenrate in the spring.
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Also the decomposition of the weeds absorbs oxygen (bacteria and organisms require for respiration)and releases CO2 into the system. So the more weeds in the summer, the more decomposed and create a harsher climate without added air circulation.