Explain how enzymes function as biological catalysts in chemical reactions.

Enzymes as biological or organic catalysts have the ability to speed up chemical reactions in the body, but they cannot start a reaction. They are unchanged at the end of a reaction. Only small amounts of enzymes are required for any reaction. Unlike inorganic catalysts, enzymes can be inactivated after prolonged action.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.