A council vote requires city education officials to contact parents when toxic chemicals are discovered in classroom lighting fixtures, though officials say they already do.

The E.P.A. sponsors a contest to find useful apps for the enormous amounts of environmental data that it collects and maintains.

A poll shows that for the first time, a majority of Americans are aware that incandescent bulbs are on their way out.

A poll shows that for the first time, a majority of Americans are aware that incandescent bulbs are on their way out.

Builders will soon be able to earn credit toward LEED certification by embracing design elements that limit feathered fatalities.

Builders will soon be able to earn credit toward LEED certification by embracing design elements that limit feathered fatalities.

A new K-to-12 school in rural Mosca, Colo., offers plenty of natural daylight and other design features intended to create a better learning environment while reducing energy costs for the district.

Belkin has a new line of products that measure the electricity consumption of specific bulbs or appliances, calculate the costs and find ways to achieve savings.

The prize LED bulb uses just 9.7 watts to match the light output of a 60-watt incandescent, compared with 12.5 watts of its currently sold LED product.

This year, 245 buildings — including hospitals, schools, banks and churches — are competing to reduce their energy consumption, up from 14 last year.