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The Mayors Announce Their Support For Climate Change Strike

The Mayors of Paris, New York, Los Angeles and Copenhagen on Friday announced their support for the global climate strike

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mayors, worldwide, climate change, strike
We have an opportunity to show, not only that we hear their message, but that they have inspired us to act even faster. Pixabay

The Mayors of Paris, New York, Los Angeles and Copenhagen on Friday announced their support for the global climate strike.

“Today, September 20th, these inspiring young leaders have called for adults to join them for a global climate strike. We have an opportunity to show, not only that we hear their message, but that they have inspired us to act even faster,” they said in a joint statement.

“As mayors, our greatest responsibility is to protect the lives and wellbeing of those that live in our cities. As adults, our obligation is to leave the world in a better state for our children than we inherited it,” they said.

“That is why we are supporting the global climate strike. Mayors around the world, working through C40 Cities, are committed to deliver on the Paris Agreement and taking action to peak their emissions as our cities already have and bring them down sharply by 2030.

“Many businesses, investors, labour groups, faith leaders and local communities share our urgency…Young people are telling us that the climate emergency demands an emergency response. We couldn’t agree more,” the Mayors added.

mayors, worldwide, climate change, strike
C40 Cities connects 94 of the world’s greatest cities to take bold climate action, leading the way towards a healthier and more sustainable future. Pixabay

They are the Mayor of Paris and Chair of C40 Cities, Anne Hidalgo; Mayor of New York City, Bill de Blasio; Mayor of Los Angeles, Eric Garcetti; and Lord Mayor of Copenhagen, Frank Jensen.

Following next week’s UN Climate Action Summit, these four leaders will be among 70 plus Mayors committing to more ambitious climate action at the C40 World Mayors Summit in Copenhagen on October 9-12.

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C40 Cities connects 94 of the world’s greatest cities to take bold climate action, leading the way towards a healthier and more sustainable future. (IANS)

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Ozone-Depleting Substance Causes Half of Arctic Warming

Ozone-depleting substances behind half of Arctic warming

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Arctic warming
Ozone-depleting substances caused half of Arctic warming and sea ice loss. Pixabay

Ozone-depleting substances caused half of Arctic warming and sea ice loss from 1955 to 2005, causing about a third of all global warming during that period, reveals a significant study.

A scientific paper published in 1985 was the first to report a burgeoning hole in Earth’s stratospheric ozone over Antarctica.

The discovery left scientists into a huddle to determine the cause which happened to be ozone-depleting substances – long-lived artificial halogen compounds entirely manmade and popularly used as refrigerants, solvents and propellants.

The new study from researchers at Columbia University and published in the journal Nature Climate Change examined the greenhouse warming effects of ozone-depleting substances (ODS).

Arctic warming
Ozone-depleting substances act as a strong supplement to carbon dioxide and had lead to Arctic warming. Pixabay

It found that the ozone-depleting substances acted as a strong supplement to carbon dioxide, the most pervasive greenhouse gas. “We showed that ODS have affected the Arctic climate in a substantial way,” said researcher Michael Previdi from Lamont-Doherty Earth Observatory.

The scientists reached their conclusion using two very different climate models that are widely employed by the scientific community, both developed at the US National Center for Atmospheric Research. The results highlight the importance of the Montreal Protocol, which has been signed by nearly 200 countries.

“Climate mitigation is in action as we speak because these substances are decreasing in the atmosphere, thanks to the Montreal Protocol,” said Lorenzo Polvani, lead author of the study. “In the coming decades, they will contribute less and less to global warming. It’s a good-news story”.

In the 1980s, a hole in Earth’s stratospheric ozone layer, which filters much of the harmful ultraviolet radiation from the sun, was discovered over Antarctica. Scientists quickly attributed it to ODS. The world sprang into action, finalizing a global agreement to phase out ODS.

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The Montreal Protocol was signed in 1987 and entered into force in 1989. Due to the swift international reaction, atmospheric concentrations of most ODS peaked in the late 20th century and have been declining since.

However, for at least 50 years, the climate impacts of ODS were extensive, revealed the new study. (IANS)