1. Resources

2. TYPES OF RESOURCES l Renewable Resource: a resource that can be replaced in nature at a rate close to its rate of use

3. l Examples:  air  solar energy  trees

4. Nonrenewable Resource: a resource that cannot be replenished by natural processes

5. Examples: - fossil fuels (coal, oil, natural gas) - gold - iron - limestone

6. LIFE CYCLE OF COAL peat: mainly decaying twigs and leaves lignite: soft, brown coal bituminous: soft coal (good energy source, pollutes the air) anthracite: hard coal; cleanest burning

7. PETROLEUM (Latin: rock oil) 2 Primary uses – to Build and to Burn

8. Building – produces plastics, fabrics, synthetic vitamins, shampoos, makeup, and much more. Uses of Petroleum Burning – heating, transportation, generating electricity

9. Environmental Impact of processing of petroleum:  Possible transportation accidents  Offshore drilling rig accidents

10.  Energy used in pumping and refining causes pollution  Final burning releases CO and CO2 into air  Global warming?  Air pollution

11. Availability of Fossil Fuels...  In many cases, the countries that consume large amounts of fossil fuels have very limited reserves of their own.

12. A traditional coal burning power plant.

13. Alternative Sources of Energy Hydroelectric Power Solar Energy Wind Power Geothermal Energy Biomass Fuels Nuclear Energy

14. Hydroelectric Power definition- electricity produced by flowing water pressure from water turns a turbine and powers electric generators

16.  Provides a steady source of energy  Very efficient  Most widely used renewable energy source used today

17. Safe Harbor Dam on the Susquehanna Fish lifts help shad to migrate

18. How Hydroelectric Works how it works

19. Solar Energy Definition - energy from the sun Solar Cells - a.k.a. photovoltaic cells, convert solar energy into electricity

21. Types of Solar Heating Systems Passive System - converts sunlight into thermal energy without using pumps or fans Active System - captures the sun’s energy, then uses fans and pumps to distribute heat.

22. Did you know? In one day, Earth receives enough solar energy to meet the energy needs of the entire world for 40 years.

23. Solar Power

24. Wind Power l definition: wind is used to turn a turbine and generate electricity l “Wind farms” generate large amounts of electricity l Currently less than 1% of the world’s electricity comes from wind power

25. Wind farms are becoming more common across Pennsylvania and the rest of the country.

26. Wind Turbines

27. Geothermal Energy definition: heat from the interior of the Earth l Can be in the form of water or steam

29. Geothermal Energy

30. Biomass Fuels definition: fuel from living things Examples: corn (ethanol), sugar cane

31. Nuclear Energy

32. Nuclear Fission definition - splitting of an atom’s nucleus into two smaller nuclei U-235

34. nuclear reaction heats water; creates steam which turns a turbine 20% of electricity in US

36. Major pollutant is hot water! Also waste disposal is not easy

37. Nuclear Fusion definition - combining of two nuclei to produce a single larger nucleus

39. - Currently scientists cannot control it - Clean, inexpensive energy source