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The use of skin lotion is not so popular in years ago. In the past our earth still has enough substance to reflect the ultra violet from the sun. Now, the carbon dioxides increases and the earth have less power to reflect UV. The scientists advise us to use lotion to protect our skin. Since our world is not the same as before, especially with increases in pollution, we can’t simply argue and compare our current daily routine with what people did years ago.

 

In some parts of the world, especially in Africa and Asia Pacific, sun shine can easily find during the day. Even though the sun energy has been give lots of benefits for cooking and heat the water, sun which relatively continuous doesn’t gives any guarantee for the clean drinking water. The unclean drinking water which contains lots of pathogens can caused illness toward our body which has possibility lead to death. The simple way to eliminate pathogens from water is by using solar water treatment.

Decades ago, our ancestor may not too concern where the water they got come from. Where the industrial era hasn’t even start and the population hasn’t across the green line, drinking from clean river is not a big deal. Implement our ancestor behavior in the present time may caused you suffer from diarrhea and stomach ache, prevent it by purify your drinking water.