Allen, John

In Our Time: Photosynthesis

In the end nearly all life on Earth depends on sunlight for its energy source. Heterotrophs like ourselves are a step or two away from the sunlight, but ultimately it's the process of photosynthesis that fuels our food and thus ourselves. Photosynthesis also, as a byproduct, provides the air we breathe. The three experts who talked about it on In Our Time were Nick Lane (University College London), Sandra Knapp (Natural History Museum) and John Allen (Queen Mary, University of London).

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