I have a favorite book for gardening and household cleaning tips, Slug Bread & Beheaded Thistles, by Ellen Sandbeck. This paperback is full of non-toxic ways to get rid of pests ( insects and bacteria, not human pests! ).
One of my favorite tips from the book, is to take crushed eggshells and spread them around the base of plants in my garden. Slugs and other crawling bugs do not like to crawl over these sharp edges and will avoid your plants. This is also a good source of calcium for your soil.
Another great tip is to save your coffee grounds to add to the soil around your acid-loving plants such as tomatoes. Coffee grounds also make for a great air-freshner for the car or to deoderize a stinky couch.
This is an Earth Day must read!
Happy Earth Day a few days early!