Energy fuelled in ways that do not use up the earth’s natural resources or otherwise harm the environment, especially by avoiding the use of fossil fuels or nuclear power.
- Any serious attempt to shift from fossil fuels to alternative energy demands greater national and global efforts.
- We should pursue all viable alternative energy sources, from nuclear power to solar to geothermal.
- While we're on the subject of costs, consider that the cheapest and safest form of alternative energy is - using less.
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