Environmental engineering is an occupational technology system that takes from wide methodological issues such as chemistry, biology, ecology, geology, hydraulics, hydrology, microbiology, and mathematics to make solutions that will preserve and also betters the safety of habit creatures and amend the modality of the conditions. Environmental engineering is a sub-system of civil engineering and chemical engineering. Environmental engineers plan explanations for wastewater organization, water, and air pollution control, reprocessing, waste removal, and public wellbeing. They plan civic aquatic source and manufacturing sewage conduct schemes, and project strategies to stop aquatic illnesses and recover cleanliness in city, countryside and entertaining zones. They assess risky-waste organization schemes to assess the harshness of such dangers, direct on action and repression, and progress principles to stop disasters. Environmental engineers address resident and universal environmental matters such as acid rain, global warming, ozone reduction, water contamination and air contamination from car exhausts and manufacturing bases.