After dark, houses not connected to the electricity grid rely mainly on open-flame kerosene lamps for light.

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The world's poorest countries rely mainly on interest-free loans or grants made through the International Development Association (IDA), an arm of the bank.

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But only a small proportion of Chinese companies are listed on the stock exchange and those that are rely mainly on internal finance.

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To the east lie the Tuamotu Islands, 78 low coral atolls, where locals rely mainly on copra (dried coconut) and black pearls for income.

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But mainly, the questions many people have with hybrids is that they still rely on gasoline and they still pollute the atmosphere.

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