Reducing exposure to airborne particulate matter is a high priority. The phenomenon of non-linearity, in which concentrations of some components of particles which are formed in the atmosphere do not decline as quickly as their precursor gases can create major difficulties for pollution control.
Mukul Tewari, IBM Thomas J. Watson Research Center, Yorktown Heights, NY, USA
The Southern Westerly Winds store vast volumes of greenhouse gas emissions in the ocean. Worryingly, climate change seems to reduce the effectiveness of this carbon pump. A new study uses hydrogen from fossil leaves to better understand the links between shifts in climate and wind strength.