Restoration of the Ozone Layer Is Back on Track, Scientists Say

Under the protocol, assessments like the one issued Monday are required at least every four years. In addition to NOAA scientists, contributors included researchers with NASA, the World Meteorological Organization, the United Nations Environment Program and the European Commission. The new assessment also considered, for the first time, the effects on ozone of a potential type of climate intervention, or geoengineering. The method,known as stratospheric aerosol injection, is meant to cool the atmosphere by using airplanes or other means to distribute sulfur aerosols to reflect some of the sun’s rays…