The world population is rising sharply. According to the latest estimates from the United Nations, world population will reach approximately 7.3 billion by 2015. This population explosion will be accompanied by an expansion in economic activity across the globe – the production, transportation, and consumption of ever more commodities and goods. Global economic activity has a two-pronged effect on the environment: the depletion of natural resources and the production of climate-damaging exhaust gases.

Cities are one of the main culprits in all of this. Although they take up only 0.4% of the earth’s surface, they are responsible for about 80% of climate-damaging exhaust gases.

The challenge posed by climate change cannot be avoided. We must take measures to sustain the environment, to reduce the impact and to halt the irresponsible consumption of natural resources. What we need is: efficiency.

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