Answer:
The CWA or clean water act in U.S.A has improved the water quality.
Explanation:
To regulate the pollutants discharge in water and to improve the quality of water bodies U.S.A government has enforced the Clean Water Act. Earlier it was known as the Federal Water Pollution Control Act which was later expanded as CWA in 1972. Under this act many programmes are arranged for controlling the pollution by EPA.
According to the act, the discharge of pollutant in the moving water without any permission is illegal. The conveyances of discharge control include- pipes, houses connected to the municipality, using septic system etc. This act has greatly impacted pollution control and quality control of water bodies.
In seismology, an isoseismal map<span> is used to show lines of equal felt seismic </span><span>intensity, it is important since it shows us the severity of an earthquake.</span>
