A consumption tax isn't going to make meat suppliers any more conscious of environmental effects from poor processes though, if any thing it will push them further away from it to try and lower prices more.

Also steak is a terrible example, cows eat alfalfa which is a nitrogen fixating crop and reduces artificial fertilizer usage that doesn't require pesticides and is basically free to grow anywhere it rains. And we don't grow alfalfa in arid places to feed US people meat, we grow it in arid places because it is near the ports and container ships need some sort of cheap bulk weight to send back to China as ballast.

How high would the tax have to be to get you to stop eating so much meat?