Suggestion: Before you begin your crusade against house pets, it is necessary to examine your underlying premises that you seem to take for granted.
That is to say, Check Your Premises.
Your first premise is that Global Warming exists and is an imminent threat.
Your second premise is that Global Warming is mostly caused by mankind and can therefore be reversed by mankind.
Before you begin your crusade against pets, you must (1) find reliable, factual, undeniable proof of the Green House Effect and it’s threat to us and (2) prove that mankind is responsible for the Green House Effect.
When examining it’s existence and threat, be careful not to succumb to the bias that recent weather patterns prove the Green House Effect. You must look at the temperature over a longer period of time. You must also look at the devices recording the temperature and their proximity to urban, and thus much hotter, areas. You must also examine the data and the formulas behind the data.
If it does exist, and we find that the Green House Effect is mostly due to natural cycles in the earth (see: ice ages and periods of melting), then it is obviously illogical to spend trillions of dollars on something we cannot effect seeing as how, if true, is simply a natural cycle in the Earth’s history.
Conclusion:
Check Your Premises!