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1. Identify the principle energy sources used worldwide and classify them as either renewable or non-renewable.
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10ÂÊ world 2003 ±×¸² »ç¿ë
The principal sources of energy used worldwide are oil, coal, natural gas, nuclear, hydro, renewable energy as a picture.
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Renewable energy sources among others were used only 1% in the 2003s.
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We can classify energy sources as either renewable or non-renewable.
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Renewable energy sources are water, solar, wind, geothermy, biomass, waste
and non-renewable energy sources are oil, coal, natural gas, nuclear.
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2.what problems are there with the continued growth in energy demand in developing countries