How Long Do Drugs Stay In Your System? How Long Do Drugs Stay In Your System? Drug Detection Times indicate a point in time in which drug testing can reveal the presence of the drug metabolites in your urine, hair or saliva. This includes the time from when the drug can first be detected to the point in time when you will test clean.
Main types of pollution 3: Land Pollution. Land pollution is another of the main types of pollution to the environment. Land pollution is mainly about the contamination and degradation of Earthâs land surfaces.ain types of pollution 2: Water Pollution. Water pollution is another one of the main types of pollution of the environment. Water pollution could be in the form of any change in the physical, chemical and biological properties of water which has a harmful effect on living things.
Types of water pollution. Water pollution can come from a number of different sources. If the pollution comes from a single source, such as an oil spill, it is called point-source pollution. If the pollution comes from many sources, it is called nonpoint-source pollution.Most types of pollution affect the immediate area surrounding the source.Sometimes the pollution may affect the environment hundreds of miles away from the source, such as nuclear waste, this is called transboundary pollution.ost types of pollution affect the immediate area surrounding the source. Sometimes the pollution may affect the environment hundreds of miles away from the source, such as nuclear waste, this is called transboundary pollution.