Almost no one wants to take a vacation to a spot that has daily heavy rain or gloomy overcast skies. We all naturally want to go somewhere with clear sunny days so we can get outside, play and be active, the opposite of our dreary office job schedules. This is natural, but as a dermatologist in Florida will quickly point out, overdoing it on the beach can be problematic for your health.
We get many things from exposure to sunlight which have a positive and beneficial effect on our well being overall. We produce up to 1000 international units per minute of vitamin D just by being in sunlight, and we benefit from calcium metabolism and boost our immune system. But to get all of these benefits, we need less than 30 minutes of sun twice a week.
Modern mankind now uses an average of 15 terawatts of power on an annual basis. The amount of energy delivered to the planet through solar rays is more than 50 terawatts. While not realistically possible, if all the energy from the sun could be captured and converted to electricity, it would meet the entire power needs of man.
Even with the continuous growth in demand, such an energy source would still quell our need through the next century. The obvious advantages are the source of the energy is free, and it is very environmentally friendly, even having less impact than hydroelectric power generation. Unfortunately, the very best solar cells are about 30 percent efficient, and still a photovoltaic farm in Canada successfully produces 90 megawatts of energy.
With all the things we get from the sun that benefit our health, our emotional well being and our needs for power, one might consider the sun the great provider. It also maintains a comfortable and tolerable temperature, and in the case of the panhandle state, it idyllic recreational air and sea temperature. But as enticing as the warm surf and turf is, we must be careful as we indulge ourselves.
To gain most of the health pluses from our sun we need less than two 30 minute sessions per week. When we are really honest with ourselves, what we like is the way the sun makes us feel, the comfort of warmer waters, and that coveted skin tan. Taken in moderation and with plenty of carefully and fastidiously applied protective lotions, all vacation goals can be achieved in safety.
Doctors, especially a dermatologist in Florida, are quick to warn anyone who will listen of the danger of too much sun. The ultraviolet rays can damage the DNA of the skin leading to a painful or even deadly episode with skin cancer. This who occasionally get a sunburn but protect themselves with adequate protection otherwise may escape unharmed, but regular sunlight at a lower level can age the skin prematurely.
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