DrSugar is in the house and answering your questions.
Dear DrSugar,
I have a friend who lives in the warm suburb of Fairfield, CA, and commutes to foggier, colder San Francisco every day. She is wondering if the daily climate switch from hot and dry weather to the foggy cold is making her sick, or at least more vulnerable to cold and flu?
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Ever remember burning your bare feet on a black top in the Summer as a kid? The black color of the paved surface absorbs the light particles that it hits, exciting the pavement's particles, making the black surface warmer because its particles are moving faster. Contrarily, white surfaces reflect light, so they are cooler. 
