For a country where oil and coal use have been growing for more than a century, the fall since 2007 is startling. In 2008, oil use dropped 5 percent, coal 1 percent, and carbon emissions by 3 percent. Estimates for 2009, based on U.S. Department of Energy (DOE) data for the first nine months, show oil use down by another 5 percent. Coal is set to fall by 10 percent.
Carbon emissions from burning all fossil fuels dropped 9 percent over the two years.
Beyond the cuts already made, there are further massive reductions in the policy pipeline. Prominent among them are stronger automobile fuel-economy standards, higher appliance efficiency standards, and financial incentives supporting the large-scale development of wind, solar, and geothermal energy. (See the data.)
Efforts to reduce fossil fuel use are under way at every level of government—national, state, and city—as well as in corporations, utilities, and universities. And millions of climate-conscious, cost-cutting Americans are altering their lifestyles to reduce energy use.
For its part, the federal government—the largest U.S. energy consumer, with some 500,000 buildings and 600,000 vehicles—announced in early October 2009 that it is setting its own carbon-cutting goals. These include reducing vehicle fleet fuel use 30 percent by 2020, recycling at least 50 percent of waste by 2015, and buying environmentally responsible products.
Electricity use is falling partly because of gains in efficiency.
The potential for further cuts is evident in the wide variation in energy efficiency among states. The Rocky Mountain Institute calculates that if the 40 least-efficient states were to reach the electrical efficiency of the 10 most-efficient ones, national electricity use would be reduced by one-third. This would allow the equivalent of 62 percent of the country's 617 coal-fired power plants to be closed....