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Earth’s Ozone Layer Is Healing: UN

Another problem is that new technology has found an increase in emissions of a banned CFC out of East Asia, the report noted.

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Ozone layer
This combination of images made available by NASA shows areas of low ozone above Antarctica on Sept. 2000, left, and Sept. 2018. A United Nations report released on Nov. 5, 2018 says Earth’s protective ozone layer is finally healing after aerosol sprays and coolants ate away at it. VOA
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Earth’s protective ozone layer is finally healing from damage caused by aerosol sprays and coolants, a new United Nations report said.

The ozone layer had been thinning since the late 1970s. Scientist raised the alarm and ozone-depleting chemicals were phased out worldwide.

As a result, the upper ozone layer above the Northern Hemisphere should be completely repaired in the 2030s and the gaping Antarctic ozone hole should disappear in the 2060s, according to a scientific assessment released Monday at a conference in Quito, Ecuador. The Southern Hemisphere lags a bit and its ozone layer should be healed by mid-century.

“It’s really good news,” said report co-chairman Paul Newman, chief Earth scientist at NASA’s Goddard Space Flight Center. “If ozone-depleting substances had continued to increase, we would have seen huge effects. We stopped that.”

ozone layer
Emissions of a banned chemical most responsible for the giant Antarctic ozone hole are on the rise, according to a study which suggests that an international treaty that required an end to its production in 2010 is being violated. Pixabay

High in the atmosphere, ozone shields Earth from ultraviolet rays that cause skin cancer, crop damage and other problems. Use of man-made chemicals called chlorofluorocarbons (CFCs), which release chlorine and bromine, began eating away at the ozone. In 1987, countries around the world agreed in the Montreal Protocol to phase out CFCs and businesses came up with replacements for spray cans and other uses.

At its worst in the late 1990s, about 10 percent of the upper ozone layer was depleted, said Newman. Since 2000, it has increased by about 1 to 3 percent per decade, the report said.

This year, the ozone hole over the South Pole peaked at nearly 9.6 million square miles (24.8 million square kilometers). That’s about 16 percent smaller than the biggest hole recorded – 11.4 million square miles (29.6 million square kilometers) in 2006.

The hole reaches its peak in September and October and disappears by late December until the next Southern Hemisphere spring, Newman said.

ozone layer
Chemical Emission is the main reason of the hole in Ozone layer above Antarctica. Pixabay

The ozone layer starts at about 6 miles (10 kilometers) above Earth and stretches for nearly 25 miles (40 kilometers); ozone is a colorless combination of three oxygen atoms.

If nothing had been done to stop the thinning, the world would have destroyed two-thirds of its ozone layer by 2065, Newman said.

But it’s not a complete success yet, said University of Colorado’s Brian Toon, who wasn’t part of the report.

“We are only at a point where recovery may have started,” Toon said, pointing to some ozone measurements that haven’t increased yet.

CO2, Antarctica, ozone layer
Carbon atoms move between rocks, rivers, plants, oceans and other sources in a planet-scale life cycle. Flickr

Another problem is that new technology has found an increase in emissions of a banned CFC out of East Asia, the report noted.

Also Read: No Definition Of Green-Firecrackers, Probably Too Late To Put A Check: Environmentalists

And the replacements now being used to cool cars and refrigerators need to be replaced themselves with chemicals that don’t worsen global warming, Newman said. An amendment to the Montreal Protocol that goes into effect next year would cut use of some of those gases.

“I don’t think we can do a victory lap until 2060,” Newman said. “That will be for our grandchildren to do.” (VOA)

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Delhi’s Air Quality Leads To Ban On Trucks And Construction

The measures include a ban on industries using coal and biomass, brick kilns, construction activities and entry of trucks into Delhi.

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India, air pollution, WHO, diwali, Pollution, Delhi, egypt, air quality
A man walks in front of the India Gate shrouded in smog in New Delhi, India. VOA

With no improvement in the air quality of Delhi-NCR even three days after Diwali, the environment authority on Saturday extended the ban on the entry of trucks, construction and polluting industries.

The Supreme Court-appointed Environment Pollution (Prevention and Control) Authority (EPCA) on Saturday ordered the Delhi government to extend the ban which was imposed on November 2.

Pollution, Delhi, egypt, air quality
As pollution levels spike, Delhi and its satellite towns are enveloped in a haze of smog. VOA

The restrictions imposed till November 10 were extended to November 12, by when there will be an improvement in the air quality of Delhi-NCR, as forecast by pollution monitoring agencies.

The restrictions were imposed by the EPCA under the Graded Response Action Plan (GRAP).

Delhi’s air quality started deteriorating a day after Diwali to “severe-plus” or “emergency” due to fireworks and weather conditions like wind speed and dipping mercury, leading to lower dispersion rate of pollutants. The Air Quality Index (AQI) on Saturday was 401 or “severe”.

India, air pollution, WHO, diwali, Pollution, Delhi, egypt, air quality
A bird flies past the Humayun’s Tomb shrouded in smog in New Delhi, India. VOA

“The CPCB-headed task force has informed EPCA that given the prevailing adverse conditions, the following measures will remain until November 12, when it will further review the situation and inform us,” said EPCA Chairman Bhure Lal, in a letter to Delhi Chief Secretary Anshu Prakash, the Delhi Environment Secretary and the Delhi Pollution Control Committee.

Also Read: Delhi’s Pollution Brings Down The Diwali High

The measures include a ban on industries using coal and biomass, brick kilns, construction activities and entry of trucks into Delhi. The restrictions exclude power plants and waste to energy plants. (IANS)