Tens of thousands of people demonstrated Saturday in several Swiss cities against climate change, the Swiss news agency Keystone-ATS reported.
Around 50,000 marched in all, the news agency estimated, including 15,000 in Zurich and up to 9,000 in the capital, Bern, and in Lausanne.
“It’s about knowing if finally we want to listen to the voice of science,” high school student Jan Burckhardt told ATS.
“Save the climate, please: It’s the last time we ask politely,” read one of the placards at the Lausanne demonstration, an AFP photographer saw. The marches were organized by an alliance of activist groups in Switzerland, including Greenpeace, Swiss Youth for Climate and green groups.
“We don’t want to stop our movement as long as our claims have not been heard, as long as we have not obtained concrete results,” said Laurane Conod, one of the organizers of a smaller march in Geneva.
The climate change protests in Switzerland were in part inspired by the teenage Swedish activist Greta Thunberg, who started weekly school strikes calling for policy change on the climate issue. (VOA)
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).
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.
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)