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Explainers

Overviews of climate change science, solutions, and related topics, written by scientists and experts.

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airplane
Explainer

Aviation

Aviation emissions are responsible for around 5% of climate warming, and this share is rising.
hydrogen fuel tank
Explainer

Hydrogen

Hydrogen is the most abundant chemical substance in the universe. It can be used as a fuel that does not produce greenhouse gases when burned.
cornfield
Explainer

Biofuel

Biofuel is any liquid fuel made from “biomass”—plants and other biological matter like animal waste and leftover cooking fat.
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