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Alternative energy sources will save the world (Renewable energy sources…
Alternative energy sources will save the world
Renewable energy sources
Don't emit greenhouse gases
Tops the list of changes against climate change
More to recommend
Creating jobs
Better energy access
Lower energy bills
Wind and solar setting records for power generation
Greenhouse gases
Reached historically high levels
Trap heat in atmosphere
Global temperatures rising
Extreme weather events
Renewables
Definition
Perpetually available
Virtually inexhaustible
Not necessarily sustainable
Hydropower
World's biggest source of renewable energy
Dams replenished by rain /snow
Drawbacks dams
Disrupt ecosystems
Vulnerable to silt buildup
Not working with drought
Wind power
Capacity increased
23,900 MW -> 539,000 MW
Prices are declining
Very valuable resource
Danger to birds
Solar power
Reshaping energy markets around the world
Energy capacity increased 4.300%
Solar power plants
Using heat from the sun
Two % of total energy used in the US
Ways to boost renewable energy
Renewable portfolio standards
100 cities worldwide
70% on renewables
Corporations to buy record amounts renewable energy