The document discusses environmental legislation in Pakistan. It outlines that the 1973 constitution included environmental pollution and ecology in the concurrent legislative list, empowering both national and provincial governments to create laws. Key pieces of legislation mentioned include the Pakistan Environmental Protection Act of 1997, which established the Pakistan Environmental Protection Council and provincial environmental protection agencies. The act also defines regulations around industrial effluents and emissions. National environmental quality standards were established in 1993 to govern areas like water, air, and noise pollution.