An official website of the United States government
Here's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Biodiesel is a renewable fuel made of vegetable oils or animal fats. It can be produced from new oils such as soy or used vegetable oils like restaurant grease.
Smart Grid technology, including advanced smart meters, provides both consumers and utilities with the information to better manage electricity use, in real time.
Investing in an energy efficient water heater can save you money, and using Energy Saver's comparison chart makes it easy to find the right water heater for your home.