Asthma is an allergic disorder in which wheezing sound is produced due to inflammation of bronchioles.
The Montreal Protocol (an international treaty in Canada, 1987) was signed to control the emission of ozone depleting substances into the atmosphere.
Aerosols through its direct or indirect effects on plants can cause various problems in agriculture.
However, continuous increase in air pollution may represent a threat to agriculture in the future.
High amount of organic waste in a lake will trigger and activate decomposer microbes which will decompose organic waste.
BOD will shoot up and decomposers will utilise most of the dissolved oxygen present in lake.
Consequently the level of dissolved oxygen will go down to alarming extent.
DDT is non-biodegradable and not metabolised within the body of an organism rather it accumulates in the fat tissues therefore its concentration goes on increasing from one trophic level to another.
In an aquatic food chain sea gull is the top carnivore therefore will possess highest concentration of DDT.
Biochemical oxygen demand (BOD) indicates the degree of organic pollution in water.
Petroleum is not degraded by decomposer microbes.
Joint Forest Management originated in West Bengal accidentally at the Arabari Forest Range in West Midnapore, near Midnapore town in 1971.
After the initial successes in West Bengal and Haryana, the JFM schemes received national importance in the legislation of 1988.
Domestic sewage rich in organic waste leads to increase in Biological Oxygen Demand, which leads to decrease D.O. (dissolved oxygen) which leads to death of fishes.
The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation.
Due to eutrophication, water bodies lack oxygen causing death of aquatic life.
