The current energy consumption profile is shown on the figure below. 80.3% of the energy produced in the World is fossil fuel. Fossil fuels are non-renewable and will eventually run out. Also, since fossil fuels are carbon based, when burned CO2 is released into the atmosphere. The technology available today should be used to create more efficient ways of obtaining renewable energy, rather than better methods of fossil fuel extraction. Increasing renewable energy usage will cut down on CO2 in the atmosphere, thereby reducing the greenhouse effect. Without changing the current energy usage profile, CO2 will continue to be pumped into the atmosphere at an unsustainable rate, thus increasing the temperature of the planet. This affect, although it sounds relatively harmless, can wipeout coastal cities and have devastasting effects on marine life.
Figure : http://www.personal.psu.edu/kdh5039/Assignment6/Assignment6.html
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