How does pollen help climate research?

Pollen from flowers contains a wealth of climate data from the past. It can show when, where and under what weather conditions plants were growing. This is because the type of plants that are able to flourish in a particular region depends very much on prevailing climate conditions. Some plants need warmth, while others have adapted well to cold conditions. Climatologists find traces of pollen in sediments, glaciers and the soil from ice-age bogs. They are also able to gather valuable information about climate fluctuations that occurred over the last 150,000 years with the help of pollen that has sunk to the bottom of the sea.

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