| About 90 percent of U.S. electricity comes from nonrenewable sources, mainly fossil fuels and nuclear power. |
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| We must look forward to a time, he says, when all nonrenewable sources of energy on earth will be gone: oil, natural gas, uranium, coal. |
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| Most energy today is generated by nonrenewable sources, which, to different extents, cannot ensure sustainability within societal development. |
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| These economies are currently founded on energy intensive industrialisation and lifestyles based on nonrenewable sources. |
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| It is gratifying to note, however, that many of the polymeric products previously synthesized from nonrenewable sources can now be readily prepared in an entirely sustainable manner. |
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| However, the economy's heavy reliance on petroleum and natural gas, both nonrenewable sources of energy, led the government to pursue economic diversification more aggressively. |
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| Distinguish between materials and products which are mainly based on nonrenewable sources and those which are mainly based on renewable or recycled materials. |
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