Inexhaustible and Renewable Energy Resources

….and coal, and natural gas!

• Inexhaustible Energy – Sun– Wind– Water– Geothermal

• Renewable Energy– Biomass– Wood– Alcohol– Garbage

Energy from the Sun

• Pros– No Pollution, except in the manufacturing– Very efficient– Installation is more cost

effective than laying high

voltage wires– Very quiet

Energy from the Sun

• Cons– Initial installation is expensive– Can only generate electricity during daylight

hours– Can be affected by weather

• http://www.youtube.com/watch?v=4uPVZUTLAvA

• http://www.youtube.com/watch?v=NDZzAIcCQLQ

Energy from Wind

• Pros– No pollution– Little harm to the

environment– Produces no waste– Take up little space

Energy from Wind• Cons

– Initial construction is expensive– Noise– Wind can be inconsistent– Birds?? = Misconception

Energy from Wind

• http://www.youtube.com/watch?v=niZ_cvu9Fts

• According to a recent report posted by the DOE’s National Renewable Energy Lab (NREL), renewables can contribute 80% of American electricity by the year 2050. Much of it will be provided by wind power installations.

The fact is….• There is no perfect energy source. Each

and every one has its own advantages and compromises. It is a matter of weighing those advantages against the compromises, the pros against the cons, and making decisions based on what is best for our planet and the future.