| A | B |
|---|
| environmental science | the study of the impact of humans on the environment |
| ecology | is the study of how living things interact with each other |
| hunters-gathers | people who obtain food by collecting plants and hunting wild animals |
| agriculture | prectcie of growing, breeding, and caring for plants and animals |
| renewable resource | can be replaced relatively quickly by natural process such as fresh water,air, soil, trees and crops |
| nonrenewable resource | a resource that that forms at a much slower rate than the rate that it is consumes. such as minerals and fossil fuels. |
| pollution | an undesirable change in air, water, or soil that adversely affects the health, survival, or activities of humans or organisms |
| biodiversity | the number and variety of species that live in an area |
| Hardin's Tragedy of the Commons | aomeone must take responsibility to prevent the resource from being overused and depleted |
| law of supply and demand | the greater the demand the higher the cost |
| ecological footprint | the productive area of Earth needed to support one person in a particular country. |
| sustainability | the condition in which human needs are met in such a way that human population can survive indefinitely |
| agricultural revolution | shift to growing plants and animals instead of hunting and gathering |
| industrial revolution | shift from agriculture to fossil fuels such as coal and oil to power machines |
| population growth | increase 10 time in 400; currently at over 6 billion |
| risk assessment | the cost of any action is the risk of an undersirable outcome |
| developed countries | higher incomes, slower population growth diverse industry and strong social support. They use about 75 % of the world's resources. |
| developing countries | lower average incomes, simple and agricultural based economies, and rapid population growth |
| quality of life | improvements in travel, communications, sanitation, nutrition, and medical care. |
| enviornmental problems | natural resources, pollution, and loss of biodiversity |
