Dear EarthTalk: What's the deal nowadays with aerosol spray cans? I thought that the ozone-depleting chemicals used in them were eliminated back in the 1970s. Is this true? If so, what is now used as a propellant? Are aerosols still bad for the ozone layer? -- Sheila, Abilene, TX
Modeling the behavior of pollution clouds can help combat them
By Sam BarrettPosted 07.31.2008 at 5:25 pm 0 Comments
Chemists from Aerodyne Research, Inc. and Boston University have developed an aerosol mass spectrometer that will aid in the study of airborne particles and their effect on climate change and public health.
Wait, now pollution is preventing global warming? That's the conclusion of a recent study in the journal Geophysical Research Letters, which says rising temperatures seen in Europe over the last few years result as much from the reduction of air pollution as from the creation of it. The research, which looked at the effects of aerosols on climate, confirms an older concept known as global dimming, and complicates our understanding of how mankind affects the climate.