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In this lesson students discover that measuring the color of the Earth from space can be used as a way to tell how healthy the Earth is. This can be done both to help farmers grow crops and to observe how deforestation has affected the planet. Students will also be able to download the most recent vegetation map, to compare today's data to an average January or July. As they compare vegetation maps, they will see that some regions are green all year long, other regions in the Southern Hemisphere are greener in January, some regions in the Northern Hemisphere are greener in July, while some regions like deserts and polar ice regions are never green.
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