1. Sustainable Development

2. Resource use that aims to meet human needs while preserving the environment Resource use that aims to meet human needs while preserving the environment Done to meet these needs not only in the present, but also for generations to come Done to meet these needs not only in the present, but also for generations to come Ties together concern for the carrying capacity of natural systems with the social challenges facing humanity Ties together concern for the carrying capacity of natural systems with the social challenges facing humanity

3. The World as a System Sustainable development requires that we see the world as a system Sustainable development requires that we see the world as a system A system that connects space and a system that connects time A system that connects space and a system that connects time Ex) Pollution from North America affects air quality in Asia, and pesticides sprayed in Argentina could harm fish stocks off the coast of Australia Ex) Pollution from North America affects air quality in Asia, and pesticides sprayed in Argentina could harm fish stocks off the coast of Australia Ex) Decisions our grandparents made about how to farm the land continue to affect agricultural practice today Ex) Decisions our grandparents made about how to farm the land continue to affect agricultural practice today

4. Energy is Necessary Energy was first used by people for heating, lighting, and cooking Energy was first used by people for heating, lighting, and cooking As humans began to farm larger land, their energy demands changed. As humans began to farm larger land, their energy demands changed. When the industrial revolution occurred, people's energy demands changed to meet the needs of industry When the industrial revolution occurred, people's energy demands changed to meet the needs of industry Energy, although invisible, is needed to heat and cool homes, cook our meals, fuel our transportation, and operate our farms and businesses. Energy, although invisible, is needed to heat and cool homes, cook our meals, fuel our transportation, and operate our farms and businesses.

5. Energy Facts More than 25% of the average city apartment dweller's electrical costs go for refrigeration More than 25% of the average city apartment dweller's electrical costs go for refrigeration If every gas-heated home was properly caulked, weather-stripped, and insulated, enough natural gas would be saved annually to heat about 4,000,000 homes If every gas-heated home was properly caulked, weather-stripped, and insulated, enough natural gas would be saved annually to heat about 4,000,000 homes In one year people on Earth use up the amount of fossil fuel it took one million years to produce In one year people on Earth use up the amount of fossil fuel it took one million years to produce If every household in the United States lowered its average heating temperature six degrees for 24 hours, we could save more than 570,000 barrels of oil. If every household in the United States lowered its average heating temperature six degrees for 24 hours, we could save more than 570,000 barrels of oil.

6. Sustainable Energy Energy that meets the needs of the present without compromising the ability of future generations to meet their needs Energy that meets the needs of the present without compromising the ability of future generations to meet their needs Includes all renewable energy sources, such as hydropower, solar energy, wind energy, and geothermal energy Includes all renewable energy sources, such as hydropower, solar energy, wind energy, and geothermal energy It also includes technologies designed to improve energy efficiency (ex. Hybrid cars) It also includes technologies designed to improve energy efficiency (ex. Hybrid cars)

7. Renewable Resources A substance of economic value that can be replaced or replenished in the same amount or less time as it takes to draw the supply down A substance of economic value that can be replaced or replenished in the same amount or less time as it takes to draw the supply down Most have essentially an endless supply, such as solar energy, wind energy and geothermal energy Most have essentially an endless supply, such as solar energy, wind energy and geothermal energy Energy obtained from renewable resources puts much less strain on the limited supply of fossil fuels (non-renewable resources) Energy obtained from renewable resources puts much less strain on the limited supply of fossil fuels (non-renewable resources) The problem with using renewable resources on a large scale is a cost problem The problem with using renewable resources on a large scale is a cost problem More research is needed to make their use cost-effective More research is needed to make their use cost-effective