The Pentagon is weighing a series of proposals to make the military more energy efficient, from mandating all-electric vehicles to weaning trucks, ships and aircraft off of fossil fuels, according to people familiar with the options.

The Biden administration has made clear from the beginning that combating climate change is a top priority — and the Pentagon, the world’s single largest energy consumer, has a key role to play. The military has a record of developing new policies intended to curb greenhouse gases, and a massive budget of roughly $700 billion annually to carry them out.

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