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Ice core data show why air pollution is dropping more slowly in US and Western Europe despite lower sulfur emissions


Ice core data show why air pollution is dropping more slowly in US and Western Europe despite lower sulfur emissions
The air in the United States and Western Europe is much cleaner than even a decade ago. Low-sulfur gasoline standards and regulations on power plants have successfully cut sulfate concentrations in the air, reducing the fine particulate matter that harms human health and cleaning up the environmental hazard of acid rain.
Despite these successes, sulfate levels in the atmosphere have declined more slowly than sulfur dioxide emissions, especially in wintertime. This unexpected phenomenon suggests sulfur dioxide emission reductions are less efficient than expected for cutting sulfate aerosols. ....

United States , Shohei Hattori , Yoshinori Iizuka , Becky Alexander , Tokyo Institute Of Technology Tech , Institute Of Low Temperature Science , Hokkaido University , Program Grant Number , University Of Washington , Japan Society For The Promotion Of Science , Japan Ministry Of Education , Western Europe , Tokyo Institute , Tokyo Tech , Japan Ministry , Japan Society , Joint Research , Low Temperature Science , Arctic Challenge , ஒன்றுபட்டது மாநிலங்களில் , பெக்கி அலெக்சாண்டர் , டோக்கியோ நிறுவனம் ஆஃப் தொழில்நுட்பம் தொழில்நுட்பம் , நிறுவனம் ஆஃப் குறைந்த வெப்ப நிலை அறிவியல் , ோக்கைடோ பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் வாஷிங்டன் , ஜப்பான் சமூகம் க்கு தி ப்ரமோஶந் ஆஃப் அறிவியல் ,