Using solar power for cleaner water
Effects on the water
SODIS (solar disinfection) is an inexpensive system used to clean and heat up water, killing all bacteria and germs that it contains. However, SODIS only works properly within 35 degrees distance of the equator, where the suns rays are direct enough to give the UV energy required.
Effects on humans
If families in tropical countries use this system widely, SODIS will save millions of lives today because SODIS disinfects the germs that may be in the water that you are drinking. However, too much UV light from the sun can damage our skin cells and cause cancer, UV light damages and kills bacterial cells.
Long Term effects
Once the water is purified after 6 hours, it will be safe to drink and stay like that until you drink it. However, if it is a cloudy day, the water will be safe to drink in 2 days because it takes twice as long for enough UV rays to penetrate the water in the bottles. Also, many families who have no access to clean water can use this inexpensive system to save lives.
FOR FURTHER INFORMATION
Go to Homeguides.sfgate.com or Modern survival Blog