Debate

Front 1

photovoltaic-pros

Back 1

-sustainable
-Well suited to providing power in home or single building applications
-availible all ove rthe world
-well proven technology
-non- polluting
-tax incentives
-Low maintenance

Front 2

photovoltaic-cons

Back 2

-Can take a large area to produce all the energy needed
-More expensive at the current time
-Less energy on cloudy days and at higher latitudes
-No enery at night
-an energy storage device is required

Front 3

Solar thermal-pros

Back 3

-sustainable
-low cost
-well suited to providing power in home or single building application
-availible all over the world
-well proven technology
-non-polluting
-tax incentives
low maintenance

Front 4

Solar thermal-Cons

Back 4

-less energy on cloudy days and higher altitudes
-no enery at night
-large power plants take up room

Front 5

wind energy-pros

Back 5

-sustainable
-non-polluting
-energy source is everlasting
-low maintenance cost
-well proven technology

Front 6

wind energy-cons

Back 6

-unreliable , its strength depends on local wind patterns, tmeperature, time of year, and location
-equitment is very expensive compared to other enery sources
-initial cost is expensive
-Lack of highly specialized maintenance personal

Front 7

Hydroelectric-pros

Back 7

-sustainable
-non-polluting
-flood control
-resivoirs are created by damming
Reacreational oppurtunities
-Low enery cost after start up

Front 8

Hydroelectric-cons

Back 8

-changes natural river flows
-degraded water qualities
-blocks seasonal fish migration
-impact on fisheries
-ecosystem damaged
-flooding large areas of land

Front 9

geothermal energy-pros

Back 9

-sustainable
-non-polluting if performed correctly
-enery can be produced day and night with minimal downtime
-energy produced is practilly free after initial start up costs
-powerstations are realitivly small, and have a lesser impact on the enviroment

Front 10

geothermal energy-cons

Back 10

-geothermal resivoirs are limited
-need to recharge the resivoir with water that previously escaped as steam
-potential conntammination of ground water
-carbon dioxide and hydrogen sulfide can be realeased by geothermal plants
-many geothermal resivoirs are located in sensitive and pristine areas

Front 11

tidal energy-pros

Back 11

-non-polluting
-sustainable
-tides are reliable
-cost of technology likely to fall

Front 12

tidal energy-cons

Back 12

-relentlessly harsh enviroment
-not proven on a commercial scale
-enviroment and marine safety issues
-technology is currently expensive and is not very advanced
-limited geographically

Front 13

wave energy-pros

Back 13

-non-polluting
-sustainable
-constant energy
-cost of technology likely to fall

Front 14

wave energy-cons

Back 14

-not proven on a commercial scale
-installation would dammage the sea bed
-locally enviroment and marine safety issues
-technology is currently expensive and not very advanced
-limited geographically

Front 15

natural gas-pros

Back 15

-current low cost
-produces less CO2 than coal or oil
-productioncan be throttled up to supply peak demand
-can be idled down when not needed

Front 16

natural gas-cons

Back 16

-non-sustanible
-produces carbon dioxide
-natural gas reserves are limited
-prices will flucuate with supply and demand

Front 17

Ethonal-pros

Back 17

-reduces greenhouse gases
-increasing energy security by providing an alternitive to fossil fuels

Front 18

Ethonal-Cons

Back 18

-use of food crops
-increase pressure on food prices and livestock feed
-takes more energy to produce it than it makes
-does not transport well
-very corrosive on some metal parts