I don't worry about pets rather than cows and cutting forest and rain forests to grow crops in order to feed cows, pigs and chikens.

The melting permafrost and the increasing of ocean's temperature that will release large amounts of methane.

But I won't worry at all, ain't having offspring, just pets which will die before I'll do.

Ah! I'm not a catastrophist, I'm just a forestry engineer with knowledge about earth science.