Altogether there are nearly 50 programs and initiatives that comprise the U.S. Climate Action Plan to reduce greenhouse gas emissions. Most are voluntary and non-regulatory. The U.S. EPA and the U.S. Department of Energy are responsible for implementing the lion's share of these programs, but other agencies have programs too.
Federal agencies provide free technical assistance and support.
This page will focus on some of EPA's programs to reduce greenhouse gases. Carbon dioxide is a by-product of fossil fuel combustion. To the extent that we can reduce the combustion of fossil fuels, we can reduce U.S. carbon dioxide emissions. The transportation sector in this country is based on the internal combustion engine burning fossil fuels. As a source of greenhouse gas emissions, the transportation sector is a critical one because it accounts for about 30 percent of total U.S. ghg emissions.