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Air Pollution in Delhi

Background An AQI between 0-50 is considered ‘good’, 51-100 ‘satisfactory’, 101-200 ‘moderate’, 201-300 ‘poor’, 301-400 ‘very poor’ and 401-500 ‘severe’. Above 500 falls in the ‘severe-plus emergency’ category.  Measures announced under GRAP- Severe+ or Emergency- (PM 2.5 over 300 µg/cubic metre or PM10 over 500 µg/cu. m. for 48+ hours): Stop entry of trucks into Delhi (except essential

Less pollution, more soil fertility

Less pollution, more soil fertility Context: The article discusses about the causes of stubble burning in the north Indian states. Stubble burning: Stubble burning refers to the practice of farmers setting fire to plant debris that remains in farms after harvest. The origin of stubble burning can be traced to the advent of the Green Revolution. Mechanised harvesting, a feature of the Green Revolution, utilised the combined harvesting technique which left behind substantia

More than commission to check air pollution

Commission for Air Quality Management (CAQM) Context Air pollution is a serious problem with environmental, public health and economic dimensions. Northern India gets exposed to hazardous levels of air quality almost every year. Acknowledging this public health hazard, the centre government has promulgated an ordinance to set up a Commission for Air Quality Management (CAQM) in National Capital Region (NCR) and Adjoining Areas. Commission for Air Quality Management (CAQM) T

CPCB Study: Trends in Air Pollution

Trends in Air Pollution: CPCB According to a recent study commissioned by the Central Pollution Control Board (CPCB), the rate of increase in pollution levels in southern and eastern India is far greater than the Indo-Gangetic plain (IGP). It has also found that air pollution in rural areas has increased at par with urban India. About the Study: It was jointly carried out by IIT-Delhi and CPCB and analysed data from 2000 to 2019. The study, conducted on the basis of satellite da

UNEP report on CO2 Emissions

UNEP report on CO2 Emissions In its recent report, UNEP has highlighted that CO2 emissions from building sector is highest in 2019. The building sector emitted more than a third of global energy-related carbon dioxide. Of the total global emissions, building operations accounted for 28% & construction-related industries (cement, glass, etc) accounted 10%. Use of fossil fuels for power generation & carbon-intensive electricity sector contributed for the increased CO2 emissions.

Vapour Recovery System

Vapour Recovery System Context Green concern: Fuel stations are a major source of emission, according to the National Green Tribunal. Committee’s recommendation A joint committee appointed by the National Green Tribunal (NGT) to study air pollution in Kerala has recommended the installation of vapour recovery system at fuelling stations and retrofitting of diesel vehicles with particulate filters to improve air quality. The report pointed out that petrol refuelling s

World Air Quality Report: Delhi is the most polluted city in the World

World Air Quality Report: Delhi is the most polluted city in the World World Air Quality Report is given by IQAir Visual and Greenpeace. The main objective was to measure the presence of fine PM 2.5. Delhi remained the most polluted capital city in the world but India, on the whole, had improved its average annual PM2.5 (particulate matter) levels in 2020 than in 2019, according to a report from IQ Air, a Swiss air quality technology company specialising in protection against airb

World Air Quality Report, 2020

IQ Air, a Swiss air quality technology company released a report titled “World Air Quality Report, 2020”. About World Air Quality Report: World Air Quality is an annual report. The report is based on PM2.5 data. It is from 106 countries based on data from ground-based monitoring stations.  Key Findings Related to India India is home to 35 of the world’s 50 most polluted cities in the World. Delhi has gotten listed as the 10th most polluted city

Air Pollution in Delhi UPSC

Air Pollution and AQI Context: UPSC GS Paper III – Air Pollution (Prelims – Mains – Interview) What is the National Air Quality Index? Launched in 2014 with outline ‘One Number – One Color -One Description’ for the common man to judge the air quality within his vicinity. The measurement of air quality is based on eight pollutants, namely: Particulate Matter (PM10), Particulate Matter (PM2.5), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Car

Black Carbon study by World Bank

Black Carbon study by World Bank About Black Carbon Black Carbon (BC) =It is a Pollutant as well as a GHG. It is a solid particle or aerosol & a component of Particulate Matter. Black carbon consists of pure carbon in several  linked forms. It is formed through the incomplete combustion of fossil fuels, biofuel, and biomass (like soot & dust), and is  emitted in both anthropogenic and naturally occurring  soot.   It is short lived. It is the

Accurate estimation of Black Carbon over Himalaya

Accurate estimation of Black Carbon over Himalaya Accurate estimation of black carbon (BC), the second most important global warming pollutant after CO­2, will now be possible using optical instruments in the Himalayan region. Thanks to a parameter called the mass absorption cross-section (MAC) specific to the Himalayan region that scientists have estimated. It will also improve the performance of numerical weather prediction and climate models. Scientists at the Aryabhatta Resear

National Mission on use of Biomass in coal based thermal power plants

National Mission on use of Biomass in coal based thermal power plants Ministry of Power has decided to set up a National Mission on use of Biomass in coal based thermal power plants. This would further support the energy transition in the country and our targets to move towards cleaner energy sources. Objectives: To increase the level of co-firing from present 5% to higher levels to have a larger share of carbon neutral power generation from the thermal power plants. To take up R&a

Graded Response Action Plan (GRAP)

Background An AQI between 0-50 is considered ‘good’, 51-100 ‘satisfactory’, 101-200 ‘moderate’, 201-300 ‘poor’, 301-400 ‘very poor', and 401-500 ‘severe’. Above 500 falls in the ‘severe-plus emergency’ category.  Measures announced under Graded Response Action Plan (GRAP)- Severe+ or Emergency- (PM 2.5 over 300 µg/cubic meter or PM10 over 500 µg/cu. m. for 48+ hours): Stop entry of truc

Micro plastics in Ganga

Micro plastics in Ganga An analysis of the stretches of the river Ganga by a Delhi-based environment NGO, Toxics Link, has revealed pollution by microplastics, defined as synthetic solid particles sized ranging from 1 micrometre to 5 millimetre (mm), which are insoluble in water. The Ganga flows across five States and has been at the centre of a massive multi-crore undertaking by the Union government, in the form of the National Mission for Clean Ganga, to rid it off contamination.

Green Crackers and NGT

Green crackers are less harmful and less dangerous than the conventional ones.  They are the crackers with  reduced emission and decibel level. They are known  as 'green' firecrackers because they have a chemical  formulation that produces water molecules, which  substantially reduces emission levels and absorbs  dust. They are cheaper to manufacture and produce 30-35% less SO2 and NO2 emissions. What are the Green Crackers

Aerosol and Climate Change

Aerosol and Climate Change Scientists tracing the concentration, size and evolution of aerosol particles smaller than 3 nanometres at an urban location in India have found frequent formation of sub-3nm aerosol particles in the atmosphere. This has critical importance as a major fraction of these newly formed particles can reach to sizes of cloud condensation nuclei where they have climatic impacts. The formation of small molecular clusters of sub-3nm size is technically called aerosol nu

Air Quality Commission Bill for NCR Delhi cleared

To read complete news on Air Pollution of Delhi: click here   The Lok Sabha passed the Bill to formalise the Commission for Air Quality Management For National Capital Region and Adjoining Areas. The body has a full time chairperson and a range of members consisting of both representatives from several Ministries as well as independent experts and will have the final say on evolving policy and issuing directions to address air pollution in Delhi and the adjoining regions. The Cen

India’s first Smog Tower in Delhi

Chief Minister Arvind Kejriwal on Monday inaugurated a ‘smog tower’ in Connaught Place and said similar towers would be built across the city, if results of the current pilot project are satisfactory. What is a Smog Tower? The smog tower is a 24 metre-high structure fitted with fans and air filters. This is to solve the problem of Air Pollution in Delhi. It will draw in polluted air from the top and release filtered air near the ground through fans fitted on the sides

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