Rain water is the main source of natural water, since it directly comes from atmosphere, it is the purest form of water. The later part of rain water is devoid of any impurities. Therefore it is considered as the purest form of natural water.

The bottled water that we consider to be the purest form of water actually comes from rainwater. This is because rainwater is pure, distilled water evaporated from the sun – nothing else. However, when rainwater falls from the sky, substances from the air and land melt into the rainwater.

Purified water is usually tap or groundwater which has been treated to remove harmful substances like bacteria, fungi, and parasites. This means that drinking it is pretty much guaranteed to be safe.

Most rain is perfectly safe to drink and may be even cleaner than the public water supply. Rainwater is only as clean as its container. Only rain that has fallen directly from the sky should be collected for drinking. Boiling and filtering rainwater will make it even safer to drink.

Wrought iron

fullerenes

Coke is a product of destructive distillation of coal. This baking drives off volatile parts of the coal, such as water, gas, and tar. Coke is an almost pure form of carbon. The calorific value (heat energy produced when a fuel is burnt) of coke is about 56,000 kilojoules/kilogram.

Move over, diamond: The title of hardest material now belongs to Q-carbon, a new substance created by researchers using laser light, The New York Times reports.

It doesn’t seem unreasonable to wonder whether diamonds are bulletproof, since diamond is the world’s hardest natural material. Diamonds are not however bulletproof in general, as while they are hard, they are not particularly tough and their brittleness will cause them to shatter when struck by a bullet.