I have a math worksheet and it asks "what is wrong with camping on the Sahara desert

This is not really a maths question, but rather a question about geography and climate: Sahara is a very dry place without any resources that gets very hot, especially during the day. If you camp on Sahara, you will not be able to find food or water, and you will be struggling with hiding from the heat. This would be very dangerous and you could potentially die - so you should not attempt to camp on the Sahara desert.