Preventing cholera is as simple as providing safe, clean drinking water. Emergency water filter pouches help to do exactly this. They are filled with sugar syrup and salt. You drop the pouch into muddy water or even urine. After a few hours, the pouch fills with enough drinking water for a whole day. The flavor is like a sports drink.

it takes hundreds of years to become stable.

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he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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