Particles of 2.5 µm and lesser diameter (PM 2.5) pass deep into the lungs causing breathing and respiratory problems, irritation, inflammation and damage to lungs.
It cannot directly enter circulatory system but indirectly through respiratory system.
In Doha, Qatar on 8th December 2012, the "Doha amendment to the Kyoto Protocol" was adopted.
The second commitment period is from 1st January 2013 to 31st December 2020.
Carbon dioxide is a greenhouse gas with warming effect of 60%.
Recently the concentration of greenhouse gases has started rising that is resulting in increasing the mean global temperature.
In year 1997, at the conference of parties III (CoP - 3) , Kyoto, Japan the Kyoto conference on climate change took place.
Global warming can be controlled by reducing deforestation and cutting down use of fossil fuel.
In India, the Air (Prevention and control of pollution) Act came into force in 1981 but was amended in 1987 to include noise as an air pollutant.
BOD is a measure of organic matter present in water.
It refers to amount of O2 consumed by microbes to decompose all the organic matter in 1 L of water.
Ozone present in upper part of the atmosphere ie. stratosphere is benefical for living beings.
As it functions as a shield against harmful UV-radiation.
High concentration of DDT disturbs calcium metabolism in birds which caused thinning of eggshell and their premature breaking.
Bad ozone is formed in the lower atmosphere (troposphere) that harms plants and animals.
Good ozone is found in the upper part of the atmosphere called the stratosphere and it acts as a shield absorbing ultraviolet radiation from the sun.
