> and one of the habits we have to get rid of if we
   > want to improve our ecological footprint.

A much, much bigger improvement (reduction) of humanity's ecological footprint would be for everyone to go vegan two days a week. That would potentially have a ~25% reduction in the number of animals reared and used, and would bring a commensurate decrease in ecological footprint. I think that's a worthy goal.

Disclaimer: I eat meat, but not very often now. I sometimes take milk in tea, but mostly drink green tea and water now. The rest of the time, I follow an Engine 2 diet[1].

[1]: https://www.engine2diet.com