From other organisms, this is assumed to be the beginning of a curve that will level off. In this example, it would be because of the large number of people that are of reproductive age. The western animal-rich diet may seem extravagant, but remember that it is hard to get balanced essential amino acids from grains and other vegetables. Also remember that cattle can forage and eat grass in areas difficult to use for agriculture. CO2 has a fast exchangeable pool - short term Burning fossil fuels contributes to CO2 in atmosphere.
Ozone depletion is a very different atmospheric problem.
It blocks UV light. DNA absorption peaks at 260 nm and protein peaks at 280 nm, while ozone used to block above 300 nm, so there is a potential of damage to living organisms as ozone is depleted.