2% that of humans? Doesn't seem like that much.
That also means if more then 1 in 50 people decide to have a pet instead of another child it's a good trade.
[1] https://klima.com/blog/how-to-cut-your-pet-carbon-footprint-...
[2] https://www.nature.org/en-us/get-involved/how-to-help/carbon....