Forest preservation is essential to combating climate change. Growing trees absorb carbon dioxide, storing it in their wood. Forest destruction is responsible for about 20% of human-caused carbon dioxide emissions into the Earth's atmosphere.
Coal combustion in the U.S. generates around 130 million tons of coal ash each year, with power plants being the largest contributors. Bottom ash is collected from combustion chambers and fly ash is gathered from smokestacks and air pollution control devices.