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Environmental Problems Potential to damage the Earth’s diverse habitats which can lead to the extinction of species Pollution Presence of dangerous levels of substances in the environment Types of Pollution Solid waste (garbage) especially hazardous waste Chemical waste – pesticides, chlorofluorocarbons (CFCs), PCBs used in appliances and paints Radioactive wastes – nuclear power plants Resource Depletion Using up or depleting natural resources -Renewable: used over and over (fresh water, solar energy, some trees) -Non-renewable – cannot be replaced or takes a long time to renew (oil, coal, minerals Renewable can become nonrenewable rain forest – loss of habitat Rich soil – takes thousand of year per centimeter to form, washed away in less than year. Ground water – more drawn out than replaced naturally Tropical Depletion due to Alien Species Introduction of species not native to area Drive out native species Depletion due to overpopulation Human population doubling every few decades 5.2 billion in 1900 – project 14 billion by 2100 Habitat Destruction Impacts biodiversity (variety of life) Deforestation – clearing of forests which leads to habitat loss. Wetland destruction – loss of flooding control and habitat Marine habitat – man-made disasters such as oil spills, pollution