Energy Efficiency

Steam rising from the cooling towers of the John Amos power plant on the Kanawha River in West Virginia

Updated Sep 28, 2026

How much wasted energy the US produces, and where it goes

See how much wasted energy the US produces each year, where it goes by sector, and what current LLNL, EIA and DOE numbers say is cutting it.

Color thermal infrared image of a house showing heat escaping through its roof and walls

Updated Sep 28, 2026

The sources of home heat loss

Leaky ducts let 20% to 30% of duct system air escape before it ever reaches a room, one of several places a…