What should I do about snails in the garden?

There are slug pellets on the market, but that poisonous stuff is bad for the environment and for other animals.

You can easily make a snail trap by sticking a glass jar in the ground so that the rim is just above, and then filling it with beer. The snails like beer, crawl into the pot, and … drown. Not a nice ending, but you can somewhat limit the number of snails in your garden.