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結果 : why it is necessary to conserve fossil fuels
3:39

Why do we need to conserve fossil fuels? Write 3 steps taken by gov...

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What Is Fossil Fuel? | FOSSIL FUELS | The Dr Binocs Show | Kids Learning Video | Peekaboo Kidz

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Here’s Why We Need Fossil Fuels | Benny Johnson

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Imagining a world without fossil fuels | BBC Ideas

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IELTS Essay Topic: Development of safe alternatives to fossil fuels

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Can governments give up using fossil fuels to save the climate? | Inside Story

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What are fossil fuels and how can we conserve them?

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Dennis Prager: The importance of fossil fuels

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Conservation of fossil fuels and energy

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