Chemically treated carpets, adhesives, and backings can emit numerous chemicals. Also carpets can contribute to indoor air pollution due to collection of dust and other pollutants in the carpet fibers. Where carpet is used, obtain test data prior to purchase and avoid carpets with topical chemical treatments. Consider airing-out the carpet prior to installation and use of a zeolite mineral wash to help absorb odors. Use low-VOC adhesives for installation.
Consistent maintenance is also important.
Use energy efficient lighting. Plus, they last considerably longer saving you money in the long run. These lights are available at many home improvement outlets.