ocr: FOSSIL FUELS EARLY 90 percent of the world's energy needs are met by fossil fuels (coal, oil, and natural gas), which are non-renewable resources. When burned to create energy, fossil fuels produce large volumes of gases such as sulfur dioxide, which may be linked to acid rain, and carbon dioxide, which may contribute to global warming. In the future, cleaner, renewable energy sources may be needed. POLLUTED STREET When car engines burn oil, polluting gases are released into the atmosphere.
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