There are 7 billion+ humans on earth to feed and meet the energy requirements of. This number is growing exponentially. It means that we are a successful species. Every successful species has altered the environment to such an unfavourable level that the species became extinct. If humans want to survive for a long time,  we must preserve the environment in a condition that favours our survival. Environmentalists and conservationists try to work towards extending the lifespan of humanity. They try to maintain the balance of ecology in favour of humans. The developmentalists try to raise the standard of living of the living humans by increasing their energy consumption. If the energy we consume is sourced efficiently then the impact on our environment is reduced.  If the energy sources are renewable,  then our energy consumption patterns can be maintained over longer time scales. http://www.worldometers.info/world-population/

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