However, after a short time of use, it became clear that the chemicals were disturbing the balance which exists in the Chemical pollution is not only caused by chemicals which are deliberately sprayed on land for some specific purpose. It is also caused by chemical waste that is carelessly or illegally dumped. Certain other substances are produced in the production of chemicals. These substances are often useless, and some of them are extremely dangerous. Dioxin, or TCDD, is such a by-product of the chemical industry. For some years, there were few laws that governed the dumping of dangerous chemical Wastes. As a result, they now lie in dumps all over the industrial countries. Today the deadly chemicals are in the Water and the soil of many communities; governments do not know exactly how many dangerous dumps exist. In fact, according to environmentalists, people today are continuing to dump dangerous chemical Waste illegally in spite of strict new laws against dumping.