How much of the energy that reaches Earth's outer atmosphere from the sun is available for photosynthesis in plants at Earth's surface?

Name: How much of the energy that reaches Earth's outer atmosphere from the sun is available for photosynthesis in plants at Earth's surface?
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Question

Quizplus · Accepted Answer

Only about 1% of the solar energy that reaches Earth's outer atmosphere is used for photosynthesis, as most of it is absorbed, reflected, or lost as heat.

How Much of the Energy That Reaches Earth's Outer Atmosphere