| A | B |
|---|
| Environment | All factors (living and non-living) that affect an organism or population at any point in their life cycle. |
| Environmental Scienc | The systematic study of all the factors that affect life and including the role of humans. |
| Ecological footprint | A measure of the demands placed on nature by an individual or nation. |
| Greenhouse gas | Carbon dioxide and other gases in the atmosphere that trap infrared heat, warming the earth. |
| Fossil Fuels | Supply 80% of world's energy needs. |
| President Theodore Roosevelt | Established the national park system. |
| John Muir | Founded the Sierra Club |
| Aldo Leopold | Wrote the "Sand County Almanac." |
| Rachel Carson | Wrote "Silent Spring" alerting the American public about the effects of chemical toxins and pollution on wildlife. |
| Sustainable Development | Meeting the needs of the present without compromising the ability of future generations to meet their own needs. |
| China | Country with largest greenhouse gas emissions. |
| United States | Country with largest ecological footprint per capita. |
