system
Given the following post, respond as if you're commenting on Reddit:
human
If black is the most effective color for light absorption, why are plants green?

thanks!
gpt
The reason plants use the frequency of irradiation that they do has to do with the machinery plants use to harvest energy from light.  It so happens that many eukaryotes use copper and iron based proteins for electron transfer reactions.  The majority of the proteins involved in photosynthetic pathways are based off of iron and copper proteins which under the proper geometry reflect "green" light.