Environmental pollution refers to the presence of physical, chemical, or biological agents in the environment that can harm human health, plant and animal life, or property. The main types of pollution are water pollution, soil pollution, and air pollution. Sources of pollution include household waste, industrial waste, excess fertilizers and chemicals, logging, burning of garbage, and vehicle emissions. Impacts of pollution include effects on cardiovascular health as well as climate change through higher global temperatures and sea levels. Ozone depletion from pollution allows more ultraviolet radiation to reach the earth's surface, threatening human health, agriculture, and ecosystems.