Remember that plants use sunlight to power a process called photosynthesis. This means that plants need to absorb sunlight. That’s a lot of energy to absorb. If plants absorbed all of the energy from the Sun, it would be too much. So plants have to absorb most, but not all of the sunlight. The light they don’t absorb is reflected.
It’s this reflected light that hits our eyes and allows us to see the plant. Our Sun sends out a LOT of yellow and green light. So plants reflect most of it, particularly the green light, which prevents them from absorbing too much. This green light hits our eyes, and that’s why we see plants as being green.
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