Thus, the atmosphere blocks about 77% of the Sun's UV, almost entirely in the shorter UV wavelengths, when the Sun is highest in the sky (zenith). Of the ultraviolet radiation that reaches the Earth's surface, more than 95% is the longer wavelengths of UVA, with the small remainder UVB. There is essentially no UVC.
Can Vegetarians Eat Butter? Those who follow a strict vegetarian diet are in fact allowed to eat butter as it is not a type of meat in any sense. People who are vegans however are not allowed to eat butter because of the fact that it is an animal byproduct. Many people confuse vegans and vegetarians because they seem similar, though there are some very distinct differences which are important to take note of.
Margarine. I can't believe it's got dairy in it. Photo by ilovebutter. It always drove me nuts that the âbutter alternativeâ usually contains dairy products, but historically, the goal wasnât to create a vegan version of butter but instead a product for the army and for people who couldnât afford butter.