Think twice about using pesticides. Use the least toxic material available, and limit exposure to people in your home, especially pregnant women and children. Eliminate sources of lead poisoning. Lead can exist in drinking water, paint, soil, even older vinyl blinds. City and state departments of health have guidelines for testing and cleanup.
Cigarette smoking is an environmental issue.
It creates air pollution in the home and can trigger respiratory problems in children. If you must smoke, go outside. Cut down on cleaning chemicals. Read the label on your cleaning products, and if they contain harmful chemical compounds, choose an alternative. Improve the quality of indoor air.