What is HIV and AIDS, what is water pollution

HIV is a virus that attack the cell which helps to fight against infection and make person suffer from others infections and diseases.

Aquired immunodeficiency syndrome is the Aids caused by HIV virus that is chronic.

If the natural quality of water is destroyed by mixing unwanted and harmful substances in water, it is called water pollution.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.