Stock up on a few safe, simple ingredients that can be used in most cleaning situations. Soap, water, baking soda, vinegar, lemon juice, borax, and a coarse scrubbing sponge can take care of most household cleaning needs.
Instead of using a standard drain cleaner, which likely contains lye, hydrochloric acid, and sulfuric acid, try pouring a quarter cup of baking soda down the clogged drain, followed by a half cup of vinegar. Close the drain tightly until fizzing stops, then flush with boiling water.
For an effective glass cleaner, use a mixture of half white vinegar and half water.
Baking soda and cornstarch are both good carpet deodorizers.
To clean up mildew and mold, use a mixture of lemon juice or white vinegar and salt.
A paste of baking soda, salt, and hot water makes a great oven cleaner.
In the rare instance you need to use a hazardous product, use as little as possible and dispose of it in a way that will cause minimum harm—for example, by bringing it to a hazardous waste recycling or treatment center.