Environmental engineering is the application of physical and scientific principles for solving the problems of society for Protecting People from World, Protecting world from People by guiding and spreading wise knowledge, and Improving quoality of resources around us such as Air,water and land even space.
Environmental engineering is a name for work that has been done since early civilizations, as people learned to modify and control the environmental conditions to meet needs.As people recognized that their health was related to the quality of their environment, they built systems to improve it.The ancient Indus Valley Civilization (3300 B.C.E. to 1300 B.C.E.) had advanced control over their water resources.The public work structures found at various sites in the area include wells, public baths,water storage tanks, a drinking water system, and a city-wide sewage collection system. They also had an early canal irrigation system enabling large-scale agriculture.From 4000 to 2000 B.C.E., many civilizations had drainage systems and some had sanitation facilities, including the Mesopotamian Empire, Mohenjo-Daro, Egypt, Crete, and the Orkney Islands in Scotland.The Greeks also had aqueducts and sewer systems that used rain and wastewater to irrigate and fertilize fields.
The first aqueduct in Rome was constructed in 312 B.C.E., and from there, they continued to construct aqueducts for irrigation and safe urban water supply during droughts.They also built an underground sewer system as early as the 7th century B.C.E. that fed into the Tiber River, draining marshes to create farmland as well as removing sewage from the city.
Very little change was seen from the fall of Rome until the 19th century, where improvements saw increasing efforts focused on public health.Modern environmental engineering began in London in the mid-19th century when Joseph Bazalgette designed the first major sewerage system following the Great Stink.The city's sewer system conveyed raw sewage to the River Thames, which also supplied the majority of the city's drinking water, leading to an outbreak of cholera.The introduction of drinking water treatment and sewage treatment in industrialized countries reduced waterborne diseases from leading causes of death to rarities.
The field emerged as a separate academic discipline during the middle of the 20th century in response to widespread public concern about water and air pollution and other environmental degradation. As society and technology grew more complex, they increasingly produced unintended effects on the natural environment. One example is the widespread application of the pesticide DDT to control agricultural pests in the years following World War II. While the agricultural benefits were outstanding and crop yields increased dramatically, reducing world hunger, and malaria was controlled better than ever before, the pesticide brought numerous bird species to the edge of extinction due to its impact on their reproductive cycle. The story of DDT as vividly told in Rachel Carson's Silent Spring (1962) is considered to be the birth of the modern environmental movement, which led to the modern field of "environmental engineering."