Pollution
Almost all Asian societies adversely face the problem of pollution associated with indoor and outdoor elements which may be the source of pollution. With the increase of demographic pressure and urbanization, pollution is also considered a vital concern in South Asian countries. Due to industrialization, transportation, burning of coal, and biomass, excessive use of metals, and soil depletion of natural resources and minerals merely falls under the category of pollution. According to the report of the Air Quality Life Index Pakistan is the fourth most pollution-causing country in the world and India is the second most polluted country in the world and number one in Bangladesh. Excess methane, carbon dioxide, nitrogen, sulfur, and insoluble and soluble materials emitted by vehicles and industries are harmful effects on humans such as lung cancer, asthma, and water-borne diseases. It badly influences plants and animals.
Water scarcity
Water scarcity is a major concern in almost every region. South Asian countries have become water-default regions due to population exploitation, and unplanned urbanization. Almost 90- 95 of water is consumed by agriculture and industries, and there is insufficient storage and a wasteful irrigation method. Per capita, water availability is less than the world average and 4.5% of freshwater resources availability. Pakistan, India, and Afghanistan face varying degrees of water scarcity. Groundwater depletion caused by irrigation, agriculture runoff, industries, and the unregulated release of sewage needs a major concern. Along with scarcity of water quality and quantity, both are also affected by the reduction in the quantity of water because of the recession of glaciers and disruption in the monsoon.
Global warming
Furthermore, global warming is also a main issue that is observed globally it is specifically due to human activities primarily the burning of fossil fuels such as coal, and petroleum, fire burning, and along with the emission of harmful gases. South Asian countries are the major source of carbon dioxide, so it is a crucial component in global warming. However many South Asian countries implement a tax on the use of carbon-related components, a form of small fiscal policy to reduce the concentration of carbon in the atmosphere.