ЦИТРУСЫ И СОЛНЦЕ. Боятся ли цитрусы солнца?!

Quite often on the Internet you can hear advice from "gurus" that citrus fruits get sunburned and get sunburn. And all the "advice" ends with these phrases. So are citrus fruits afraid of the sun? And if so, how do they "survive" in southern countries, where the sun is much brighter than in the CIS countries? In this video, I tried to explain why there may be affected areas on the leaves, what does the sun have to do with it, and why citrus fruits are not afraid of the sun!