Tag: economics

Deforestation means cutting of trees. It is a major cause which leads to the change in soil properties. The nutrients are not replenished in the soil and the roots cannot hold the fertile soil in a place, leading to erosion. 

The increase in temperature on the earth (due to deforestation - cutting down of trees) disturbs the water cycle and reduces rainfall. The situation may lead to droughts (high scarcity of water).

Tropical cyclone is a non-frontal storm system, usually originates over tropical or subtropical waters and rotates clockwise in the southern hemisphere and counter clockwise in the northern hemisphere. Typhoons are originated in the China sea which can be predicted seven days in advance. 

The details of polar ozone hole formation differ from that of mid-latitude thinning but the most important process in both is catalytic destruction of ozone is by atomic halogens. 

The main source of these halogen atoms in the stratosphere is photo dissociation of man-made halocarbon refrigerants, solvents, propellants, and foam-blowing agents (chlorofluorocarbon (CFCs), HCFCs, freons, halons). These compounds are transported into the stratosphere by winds after being emitted at the surface.

So, $C{ H } _{ 4 }$ does not contain a halogen therefore it is not responsible for the depletion of ozone layer.

Primary Pollutants are the ones which are injected into the atmosphere directly.  Examples include:

1. Carbon monoxide (CO)
2. Oxides of nitrogen ($N{ O } _{ x },NO$ )
3. Sulfur oxides ($S{ O } _{ x }$)
4. Volatile organic compounds (VOCs)
5. Particulate matter (dust, ash, salt particles)

PM stands for particulate matter (also called particle pollution) the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, fumes, soot, smoke, mist or fly ash are large or dark enough to be seen with the naked eye.

Tamilnadu is the largest producer of Bananas. According to 2014 reports, India stands number in the production of Bananas. The report said that 9 million tonnes of the 29.7 million tonnes of bananas produced in 2014 in India was from Tamil Nadu.

Net enrollment ratio is defined as the enrollment of the official age-group for a given level of education. The purpose of NER is to show the extent of participation in a given level of education of children and youths belonging to the official age-group corresponding to the given level of education. Net Enrollment Ratio of Tamilnadu primary schools in 2012-2013 are 99.49%.

Tanjavur which is a city in the south Indian state of Tamil Nadu is called as Rice bowl of Tamil Nadu. The city is an important agricultural centre located in Cauvery Delta.

Tamil Nadu has achieved cent percent access at the Primary level in the year 2002-2003.