This is myopic. 100,000 years ago, humans didn't understand the basic rules of how things worked. They would have no idea if and when the next ice age would happen. We've learned a lot as a species and as such, our biological need to reproduce is balanced by the logical realization of the impact we have on the planet and the impact the planet can have on us. We have higher-level thinking and more information to leverage second-order thinking. So no, that's not a joke.

How is caring about the environment(and therefore every living creature) a selfish, lazy materialist act?

Going without children against a ton of social pressure takes a lot of fortitude.

Modern consumer society is dead set on using every last scrap of natural repossible possible while telling you it's not only okay but your right because you have $$$. Bucking that trend and minimizing ones impact is selfish, lazy, and materialistic how?