Humanity is running out of time to stop the most dangerous impacts of global warming. Signs of global warming are appearing around the world—including in the United States—and the latest science suggests that future impacts are likely to occur sooner and be more severe than previously thought.
The failure of the international community to take strong action to limit global warming pollution and the death of comprehensive energy and climate legislation in the U.S. Congress in 2010 have been major setbacks in the battle to prevent the worst impacts of global warming. But there is still hope—there are plenty of opportunities to reduce emissions of global warming pollution in the United States, while restoring momentum in the fight against global warming.
By adopting a suite of clean energy policies at the local, state and federal levels, the United States could curb emissions of carbon dioxide from energy use by as much as 20 percent by 2020 and 34 percent by 2030 (compared with 2005 levels). These savings represent a significant down payment on the emission reductions America must achieve to prevent the worst impacts of global warming, and put the nation on a path to achieve further emission reductions in the years ahead.
We can save money and help solve global warming by reducing the amount of energy we use, including in the buildings where we live and work every day. More than 40 percent of our energy — and 10 percent of all the energy used in the world — goes toward powering America’s buildings. But today’s high-efficiency homes and buildings prove that we have the technology and skills to drastically improve the efficiency of our buildings while simultaneously improving their comfort and affordability.
If we apply those lessons to all buildings, we can reduce energy use in our homes and workplaces by a quarter, lowering global warming pollution from buildings 30 percent by 2030.
Power plants continue to release large amounts of toxic pollutants, including mercury, into our air. In 2010, two-thirds of all airborne mercury pollution in the United States came from the smokestacks of coal-fired power plants. In other words, power plants generate more airborne mercury pollution than all other industrial sources combined.