earth and not eating its inhabitants

You might not want to read this. I was reading my environmental science book, and these are my thoughts.

When I became vegetarian a couple years ago, I was really only thinking about the animals. But, I have been learning a lot recently, and I am surprised by the environmental impact it could
have.
For one, if plants are consumed by animals, which are consumed by humans, twice as many plants are used than if humans just ate the plants. So, this saves a ton of energy throughout earth. (Obviously animals would still eat plants but there are considerable fewer animals if the animals are not farmed.)I'm not talking about one person not eating meat, but whole countries or groups of people. That would make an impact.

Also huge amounts of land are completely destroyed by cattle grazing. Land that has been set aside by the government for preservation can be used by farms for grazing. And these cows don't just eat a bit of grass...they eat every living thing in these areas. When they wear out the land, the farmers just move the cows to another area to destroy it. I don't want to starve the cows, but if we didn't make so many of them to eat, that wouldn't be a problem.

When I stopped eating fish a while back, I didn't realize the significance as much as I do now. Many species are overfished, big fish are becoming scarce, smaller fish are next, we throw away 30% of the fish we catch, and we needlessly kill sea mammals and birds.

So, these fishing boats are the size of a football field and then they throw their gigantic nets ( or trawl bag, or drift-net or aquaculture cage or hook line or cage) into the sea and whatever is in the net is then taken out of the water. The fishermen then throw all the bycatch (non-target species) back into the ocean which are all already dead or dying. In addition to wasting potential sources of food, this can deplete the populations of bycatch species that play important ecological roles in oceanic food webs.

This is difficult to explain fully on here. I'll stop. But if you are interested in making less of an impact on our planet, think about being vegetarian...Or don't.