Reading · Part 6

Missing ParagraphsExercici 24 de 62

Ringing the Alarm for Earth

Peter Raven is a botanist. He knows about photosynthesis, primary productivity and sustainable growth. He knows that all flesh is grass; that the richest humans and the hungriest alike depend ultimately on plants for food, fuel, clothing, medicines and shelter, and that all of these come from the kiss of the sun on…

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