all you have to do is tell them to leave you alone sometimes if you tell them to leave you alone it won't work if they keep harassing you tell a parent or teacher they will help you why they keep...
Stand behind them on any of the 24 time zone lines, with both of you facing west. You'll be standing physically behind them, while they are standing an hour (or a day, if on the IDL) behind you.
UV radiation comes from the sun. If you stay indoors when the weather is very sunny you will be safe. Alternatively, wear suncream (also known as sunblock) everywhere you don't have clothes - hands,...
If you can get a radiation detector and test the level for yourself. If you just want to be sure, here are the best ways (listed in the order of importance) that you can protect yourself from nuclear...