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This lesson covers the environmental impact of energy use and how to approach evaluation questions about energy resources, as required by the Edexcel GCSE Physics specification (1PH0), Topic 3: Conservation of Energy. You need to understand global energy demand, climate change, and how to evaluate energy policies in exam questions.
The world's energy demand is increasing for several reasons:
| Fact | Detail |
|---|---|
| Global energy demand | Increasing by about 1–2% per year |
| Main source of global energy | Fossil fuels (about 80% of total energy) |
| Fastest-growing energy source | Solar and wind (renewable) |
| UK electricity from renewables | About 40–45% (and rising) |
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