Vinita Devi is teaching live on Unacademy Plus
OVERVIEW OF THE COURSE
MAY 2018 TO JAN 2019 TH AND IE MOST IMPORTANT EDITORIAL COMPILATION On Unacademy Plus Website 30 Sessions of 90 to 120 Minute:s Registrations will open by today evening Last date to Register is 1st December 2018
6th to 12th NCERTs Through 1000 MCQs (500 Detailed +500 Practice) 100 Mains Based Questions (50 Solved + 50 Practice Minimum price till next 24 Hours
History Art and Culture Geography Polity Economy Science Environment and Ecology -World History Indian Society SUBJECTS COVERED : ry
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On Popular Demand DAILY IMPORTANT EDITORIALS DISCUSSIONS - NOV. 2018
OTHER COURSES BY ME Answer Writing Course for Mains 2019 .Ultimate Course on Indian Art and Culture Detailed Course on Majid Hussain Geography Detailed Course on Spectrum's Brief History Editorial Course
CHOKED BY SMOC: ON AIR POLLUTION
smog smoke + fog (smoky fog) caused by the burning of large amounts of coal, vehicular emission and industrial fumes (Primary pollutants). . Smog contains soot particulates like smoke, sulphur dioxide, nitrogen dioxide and other components. .At least two distinct types of smog are recognized: sulfurous smog and photochemical smog
Sulfurous smog . sulfurous smog is also called "London smog" (first formed in London). Sulfurous smog results from a high concentration of SULFUR OXIDES in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal (Coal was the mains source of power in London during nineteenth century. The effects of coal burning were observed in early twentieth century) This type of smog is aggravated by dampness and a high concentration of suspended particulate matter in the air.
Photochemical smog Photochemical smog is also known as "Los ngeles smog". Photochemical smog occurs most prominently in urban areas that have large numbers of automobiles (Nitrogen oxides are the primary emissions) Photochemical (summer smog) forms when pollutants such as nitrogen oxides (primary pollutant) and organic compounds (primary pollutants) react together in the presence of SUNLIGHT. A gas called OZONE (Secondary pollutant) is formed.
Air pollution is choking several cities in the northern States once again, as changes in temperature and slowing winds trap soot, dust and fine particulate matter. The National Capital Region is badly hit, as the burning of agricultural residue in Puniab and Harvana containing, among other pollutants, highly damaging fine particulates or PM2.5 a is releasing large volumes of smoke The problem is aggravated by the burning of urban waste, diesel soot, vehicular exhaust, road and construction dust, and power generation Although India has nine of the 10 most polluted cities in the world, it has not taken consistent action on pollution Tens of millions live with ambient air quality that is well short of even the relaxed parameters the country has set for fine particulates, compared with those of the World Health Organisation.
India should at least now give high importance to the WHO warning about air pollution being the new tobacco. - This year's 'severe' air quality rating for Delhi and poor conditions prevailing in other cities in the Indo-Gangetic Plain should compel a decisive shift in policy. - The Centre and the State governments need to get into crisis mode to dramatically reduce emissions. They must address the burning of carbon, which is a direct source, and emissions with oxides of nitrogen and sulphur from vehicles that turn into fine particulates through atmospheric reactions. - Failure to take sustainable and urgent measures will inflict long-term harm on public health, affecting children even more by putting them at higher risk for diseases.
The UN Environment Programme's recent report titled 'Air Pollution in Asia and the Pacific: Science-Based Solutions' has sounded a warning, pointing out that only 8% of the population in the countries of the region get to breathe air of acceptable quality. One study of degradation of Delhi's air over a 10-year period beginning 2000 estimated premature mortality to have risen by as much as 60% - With the steady growth in the population of the capital and other cities, the trauma is set to worsen. Farm stubble burning is a major contributor to the problem, and its footprint may be growing because of wider use of mechanical harvesters that is producing more waste.
.An innovative approach could be to use climate change funds to turn farm residues into a resource, using technological options such as converting them into biofuels and fertilizers. From an urban development perspective, large cities should reorient their investments to prioritise public transport, favouring electric mobility. - The World Bank has said it is keen to enhance its lending portfolio to tackle air pollution, opening a new avenue for this. Governments should make the use of personal vehicles in cities less attractive through strict road pricing mechanisms. Sharply escalated, deterrent parking fees can be implemented. If governments delay action on the critical issue of pollution control, public pressure must force them to act