Hi, I had a discussion with a friend of mine wether or not UV-light was good for plants. I told him 'no' because I thought plants have certain mechanisms to protect them from UV-light, such as wax-layers. He thought plants needed the UV-light for fotosynthesis. Anyway, the things I was wondering :
-Is UV necessary for plants (and what about other organisms)?
-Is UVlight harmful for all organisms?
-What is the effect of a greenhouse?( because I thought the glass kept UVlight out thus protecting the plants, let IR in so it was nice and warm inside...but my friend told me glass doesn't block UVlight, though I don't believe him there).
Anyway, if there's anyone who could prove me right, I'd be very much obliged
Thanks