1. Environmental Science Understanding and solving environmental problems

2. Humans through history Hunter-gathers- caused some animals to become extinct Hunter-gathers- caused some animals to become extinct Agricultural revolution-caused human population to grow and destroyed land. Agricultural revolution-caused human population to grow and destroyed land. Industrial revolution- shift to fossil fuels. Improved quality of life for people but allowed for urban areas to flourish. Industrial revolution- shift to fossil fuels. Improved quality of life for people but allowed for urban areas to flourish.

3. The Earth is a closed system Limited resources Limited resources Population increase causes a strain on resources Population increase causes a strain on resources We produce wastes (pollution) that we can not get rid of. We produce wastes (pollution) that we can not get rid of. We have local and global environmental issues. We have local and global environmental issues.

5. What are our main Environmental Problems? 1. Resource depletion- Using our resources up faster that they can be replaced. Natural resource- any natural resource that is used by humans a. renewable resource- resources that can be replaced relatively quickly ex. Trees, water, soil, air and crops ex. Trees, water, soil, air and crops b. Nonrenewable resource- can not be replaced quickly Ex. Fossil fuels, minerals, and metals

6. What are our main Environmental Problems? 2. Pollution- undesired change in air, water or soil that has adverse affects. a. biodegradable pollutants- can be broken down by natural processes. ex. Human sewage and paper ex. Human sewage and paper b. nonbiodegradable pollutants- can not be broken down by nature. ex. Mercury, lead, and some types of plastic

7. What are our main Environmental Problems? 3. Loss of biodiversity- refers to the number and variety of species that live in an area. Endangered species-A species that is in danger of becoming extinct Threatened species-a species that numbers are falling rapidly

8. Terms to Know Sustainability- the ability of humans to use a resource without depleting it. Sustainability- the ability of humans to use a resource without depleting it. Conservation-When humans set limits on the use of natural resources Conservation-When humans set limits on the use of natural resources Tragedy of the Commons- idea from Hardin that when a resources is shared such as the air and oceans, growing population destroys it Tragedy of the Commons- idea from Hardin that when a resources is shared such as the air and oceans, growing population destroys it

9. Invasive species- any living thing that is introduced into an area where it normally does not live (non-native) American Chestnut Tree American Chestnut Tree

10. Biodiversity- All the different types of living things in a biome

11. Endangered species

12. Tasmanian Tasmanian tiger tigerDeclaredExtinct In 1986 http://www.youtube.com/watch? v=6vqCCI1ZF7o http://www.youtube.com/watch? v=6vqCCI1ZF7o

13. Threatened species video video