Mr. smith is a professional landscaper and spends a majority of his day working outside in the sun. what advice would you give him so that he can lower his risk for developing skin cancer?

If given a chance to advice Mr. Smith, I would recommend him to minimize going out in the sun when it is at the peak of the morning but if not possible since he works under the sun, it would be good to put on sunblock with a highest SPF and use precautionary measures like using hats and wearing long sleeve to protect also the skin.  More water to hydrate, and vitamins for skin protection.