Besides, every time you exhale CO2 is emitted in the atmosphere, as a waste product of metabolized oxygen. This makes up the reciprocal nature between plants and animals. We supply them CO2 and they supply us with oxygen.
Plants use oxygen, too, incidentally. They have mitochondria just like us, so they have a respiratory metabolism just like us. For the most part, most plants produce more oxygen gas than their metabolism requires. We breath the excess.
Here's the thing. The world's plants aren't sitting around starving for CO2. It's not the limiting factor on their growth. It's usually water and soil nutrients (hence you see farmers irrigating and fertilizing their fields, and never gassing them with CO2.)
There was already far more CO2 than the Earth's green life needed for photosynthesis. With the advent of human industrialization there was even more of an excess.
Besides, every time you exhale CO2 is emitted in the atmosphere, as a waste product of metabolized oxygen.
Well, no, not exactly. It's not oxygen that you're metabolizing; you're metabolizing
sugars via oxygen, and producing CO2 as a result of that. Plants, in turn, produce sugars from soil carbon and water using the energy of the sun.
Look, you're ordering pizzas for your Dungeons and Dragons group. If you have 5 people and 10 pizzas, you already have too much pizza. If you order twice that, people don't suddenly get hungrier - the excess pizza will just continue to accrue. That's the issue here with CO2 - excess piled upon excess. The capacity of plants to absorb CO2 gas is limited by other factors.
See message 102
Edited by Adminnemooseus, : Off-topic banner etc.