Chemists tackle formation of natural aerosols

City dwellers have long had to contend with smog—that ugly haze that hangs over urban areas—as a result of emissions-producing human activities as diverse as manufacturing, mowing the lawn, driving cars, and even cooking.

Designing cities for 21st-century weather

Weather extremes, such as heat waves and torrential rainfalls, are becoming more frequent and more intense across the United States under climate change.

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