The document discusses different types of energy and their associated waste emissions. It notes that natural gas produces nitrogen oxides, carbon monoxide, carbon dioxide and sometimes methane or leaks, which can harm aquatic life. Coal produces carbon dioxide, sulfur dioxide, nitrogen oxides and mercury compounds, releasing sulfur dioxide that damages trees and contaminates lakes and rivers. Oil production results in methane emissions from wells and equipment as well as natural gas burned during production, both of which can harm fish and plants. Nuclear energy uses fossil fuels and impacts aquatic life through water removal and radioactive waste. Hydroelectricity may release methane and nitrous oxide if vegetation decomposes in lakes, and affects wildlife by altering river ecosystems. Biomass burning produces nitrogen oxides