Scientists have been sounding the alarms about climate change for decades, but unfortunately we are still completely dependent on digging stuff up and burning it for our main sources of energy. The United States gets 39% of its energy from coal, which is ok from a national security standpoint until the acid rain makes our water undrinkable. Natural Gas pollutes 30% less than coal and the U.S. gets 27% of its energy from that source, but there are still significant pollution issues. And, of course, there is a threat of a meltdown, but mainly the radioactive waste is dangerous for 240,000 years.

People have been looking for alternative energy sources for decades, but progress in getting them installed means less than 15% of the energy produced in the United States comes from renewable or clean sources. Hydropower is the largest sector of green energy in the U.S., responsible for almost 7% of the power production. It is, however, not without its own issues- dams can endanger ecosystems, so hydroelectric power has to be done properly. Wind is an emerging energy sector at almost 4.5% of America’s power grid. Just one percent of power produced in the U.S. comes from solar or geothermal sources, though that number is always increasing with improvements in technology.

Transportation is one sector where small improvements in efficiency can have a huge impact. Increases in mandatory fuel efficiency have decreased air pollution since the 1970s. Continuing to increase efficiency will continue to improve the environment. Biofuels have also shown promise in decreasing pollution. Now many people are even driving hybrid electric and full electric cars. When powered with solar power they produce zero emissions, and even when they get their power from traditional sources they still pollute less than traditional internal combustion engines.

Learn more about the arsenal of green tech being employed to reduce pollution from this infographic!