Acid rain 1) Problem The problem starts here. Cars burn gasoline, factories and power plants burn coal and emit toxic fumes. Thus, the air that we breathe is polluted. 2) Acid rain pollution contamination is collected in the clouds with water and oxygen in the atmosphere, it becomes acid. Winds are polluted clouds over large distances, far 1) When there is rain, the pollution lands on trees, buildings, houses, cars, clothes, everywhere! It is called acid rain, 2) There are actually 'acid mist', 'snow' and 'rain and snow' in the same way! 3) Water and soil pollution When acid rain falls into lakes, streams, rivers and the sea, they become toxic. This is - water pollution, and it hurts, kills or destroys fish and plant species. When acid rain flows through the soil, it poisons the trees and plants. Acid rain 3) causes serious damage to important buildings and sites 4) Good news Good news - that the government tried to reduce the air pollution that causes acid dozhd.4) .. industries have used new technology for some time to help make the factory smoke less harmful to the environment. But we must do more! We can help reduce the amount of acid rain through 5) cars less or using solar energy to heat our homes.
Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.
