Ozone-destroying chemical emissions on rise despite ban
Washington, May 17: Emissions of one of the chemicals that can cause hole in the ozone layer are on the rise, despite an international treaty that required an end to its production in 2010, a new study says.
What is even more troubling is that scientists are not sure at present why emissions of this gas are increasing.
This gas, Trichlorofluoromethane, or CFC-11, is a member of the family of chemicals most responsible for the giant hole in the ozone layer that forms over Antarctica each September.
Once widely used as a foaming agent, production of CFC-11 was phased out by the Montreal Protocol in 2010.
The new study, published in the journal Nature, documents an unexpected increase in emissions of this gas, likely from new, unreported production.
"We're raising a flag to the global community to say, 'This is what's going on, and it is taking us away from timely recovery from ozone depletion,'" said lead author of the paper Stephen Montzka, a scientist at National Oceanic and Atmospheric Administration (NOAA) in the US.
"Further work is needed to figure out exactly why emissions of CFC-11 are increasing and if something can be done about it soon," Montzka said.
For the study, scientists at NOAA and Cooperative Institute for Research in Environmental Sciences at University of Colorado, Boulder, in the US made precise measurements of global atmospheric concentrations of CFC-11.
The results showed that CFC-11 concentrations declined at an accelerating rate prior to 2002 as expected.
Then, surprisingly, the rate of decline hardly changed over the decade that followed. Even more unexpected was that the rate of decline slowed by 50 percent after 2012.
After considering a number of possible causes, Montzka and his colleagues concluded that CFC emissions must have increased after 2012.
This conclusion was confirmed by other changes recorded in NOAA's measurements during the same period, such as a widening difference between CFC-11 concentrations in the northern and southern hemispheres -- evidence that the new source was somewhere north of the equator.
Measurements from Hawaii indicate the sources of the increasing emissions are likely in eastern Asia, the study said.
More work will be needed to narrow down the locations of these new emissions, Montzka said.
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Woman, 2 sons found dead in Delhi home; suicide suspected
New Delhi (PTI): Three members of a family were found dead inside their home in southeast Delhi's Kalkaji on Friday, with police suspecting it to be a case of suicide, officials said.
Police said the incident came to light around 2.47 pm when a police team reached the premises to execute a court order related to possession of the property. When repeated knocks went unanswered, the staff used a duplicate key to open the door.
Inside, officers found Anuradha Kapoor (52) and her sons, Ashish Kapoor (32) and Chaitanya Kapoor (27), hanging from the ceiling, Deputy Commissioner of Police (Southeast) Hemant Tiwari said in a statement. All three were declared dead.
A handwritten note was recovered from the room, suggesting the family had been struggling with depression.
"The handwritten note indicates emotional distress faced by the family due to which the family may have taken the extreme step," the officer said.
The bodies have been shifted to the All India Institute of Medical Sciences (AIIMS) mortuary for post-mortem and other legal formalities under Section 194 of the Bharatiya Nagarik Suraksha Sanhita (BNSS), police said.
Residents of the neighbourhood said they were shocked to learn about the deaths, adding that the family kept largely to themselves.
Pankaj Kashyap, a resident of Girinagar, said he learnt about the deaths while leaving for work. "I live and work here and was leaving for work when I saw many people standing outside and talking. That is how I got to know that three people had committed suicide. I also saw several police vehicles outside, but I do not know much beyond that," he said.
Baldev, another neighbour, said the family had been living in the newly constructed house for around two years. "We only knew that a mother and her two children lived there. They had moved into the newly built house around two years ago. We did not interact much with them. Today we heard that all three have committed suicide, and whatever we know is based on what people here are saying," he said.
Another neighbour, Ramesh Kumar, claimed the family had earlier attempted suicide.
"About fifteen to twenty days ago, the two sons in the family had attempted suicide and police and ambulances had come. That was when I first got to know who they were. I do not recognise them by face, but we saw the ambulances and police take the two sons that day. Today again we saw ambulances and police arriving, so everyone came out to see what had happened. I do not know how long they had been living here, but this is all we know," he said.
Police said they are examining the family's financial condition, social circumstances, and other factors that may have contributed to the incident. Further investigation is underway.
