New Delhi, August 28: Laughing gas or Nitrous Oxide (N2O) is the most abundant ozone-depleting substance in the 21st century as the emissions of CFC, another green house gas, has come down, a new study suggests.
“Although N2O is roughly 160th of Chloro-fluoro carbon (CFC)-11 in terms of ozone depleting potential, it has become the largest ozone depleting substance as Montreal Protocol has considerably reduced emission of others,” A R Ravishankara, Director Chemical Sciences Division, National Oceanic and Atmospheric Administration, (NOAA) USA, told PTI over phone.