Use low or no VOC materials
Volatile organic compounds, common in primers, paints, stains and sealers, cause such health problems as eye and respiratory tract irritation, dizziness, damage to the nervous system and cancer. VOCs also a primary component of smog. They have been linked to a variety of negative health effects including dizziness, irritation of the eyes and respiratory tract, damage to the nervous system, and cancer.
Limit the use of toxic pesticides
The U.S. Environmental Protection Agency reports that homeowners apply pesticides at a rate as much as 20 times higher than farmers use on agricultural land. Not only do pesticides endanger health, they pollute our water supply. Integrated pest management is just one technique for growing a productive lawn and garden without harmful chemicals.
Avoid chemically treated wood
Wood sold before 2003 may have been treated with chromated copper arsenate which could cause arsenic poisoning. Even the arsenic-free methods used to make wood rot-resistant have health risks and can pollute water. Instead, use a local wood that is naturally rot resistant.
Turn off that landscape lighting!
Better yet, install only lighting needed for entertaining or after-dark activities and leave it off at other times. Darkness is an important part of human and wildlife body cycles, called circadian rhythms. Too much artificial light reduces melatonin production in humans, with bad health effects, and interferes with the reproduction cycles of wildlife.