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 Active solar heating system  Biofuel  Cogeneration  Energy conservation  Energy efficiency  Geothermal energy  Hydropower  Super insulated house.

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Presentation on theme: " Active solar heating system  Biofuel  Cogeneration  Energy conservation  Energy efficiency  Geothermal energy  Hydropower  Super insulated house."— Presentation transcript:

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2  Active solar heating system  Biofuel  Cogeneration  Energy conservation  Energy efficiency  Geothermal energy  Hydropower  Super insulated house  Wind farm

3  A system that uses solar collectors from the sun and store it as heat for space heating and water heating.

4  Gas or liquid fuel made from plant material (biomass)

5  Production of two useful forms of energy, such as high-temperature heat or steam electricity, from the same fuel source

6  Reducing or eliminating the unnecessary waste of energy

7  Percentage of the total energy that does useful work and is not converted into low quality, usually useless heat in an energy conversion system or process

8  Heat transferred from the Earth’s underground concentrations of dry steam, wet steam or hot water trapped in porous rock

9  Electrical energy produced by falling for flowing water  In a Hydroelectric plant, the water spins a turbine to create energy

10  House that is heavily insulated and extremely airtight

11  Cluster of small to medium sized wind turbines in a windy area to capture wind and convert it to electrical energy

12  How can we improve energy efficiency? -As individuals we can save energy and money by buying more efficient cars, lighting & heating systems, air conditioners and appliances

13  Advantages:  Energy is free  Net energy is moderate to high  Quick installation  No CO2 emissions  Very low air and water pollution  Very low land disturbance  Moderate cost  Disadvantages:  Need access to sun 60% of the time  Sun blocked by other structures  Need heat storages system  Active system needs maintenance and repair

14  Advantages:  Moderate to high net energy  High efficiency  Large untapped potential  Lost-cost electricity  Long life span  No CO2 emissions  May provide flood control for a dam  Provides water for year- round irrigation of cropland  Reservoir is useful for fishing and recreation  Disadvantages:  High construction costs  High environmental impact from flooding land to form a reservoir  Floods natural areas behind dam  Converts land habitat to lake habitat  Danger of collapse  Uproots humans  Decreases fish harvest below dam

15  Advantages:  Large supply in some areas  Moderate costs  No net CO2 increase if harvested and burned sustainably  Plantation can be located on semiarid land  Can make use of agricultural, timber, and urban wastes  Disadvantages:  Nonrenewable if harvested unsustainably  Moderate to high environmental impact  CO2 emissions if harvested and burned unsustainably  Plantation could compete with cropland  Often burned inefficient and polluting open fires and stoves

16  Advantages:  Very high efficiency  Moderate net energy at accessible sites  Lower CO2 emissions than fossil fuel  Low cost at favorable sites  Low land use  Low land disturbance  Moderate environmental impact  Disadvantages:  Scarcity of suitable sites  Depleted if used too rapidly  CO2 emissions  Moderate to high local air pollution  Noise and odor  Cost too high except at the most concentrated and accessible sources

17  How can we make a transition to a more sustainable energy future? Energy policies must be developed now in order to phase new energy alternatives.  Pressure from citizens and consumers, the government and private companies need to promote and activate new ways of using our energy resources


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