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Story summary
- Solar power becomes a leading energy source by 2025, spurred by falling costs and policy support.
- By 2025, solar costs fall under $20 per megawatt-hour, making it cheaper than fossil fuels.
- Storage advances, with lithium-ion and solid-state batteries, enable 24/7 solar use.
- Global policy momentum continues: over 120 countries have updated renewable goals since 2021.
