April 23, 2024 Liu, Y., J. Wu, D. Yu and R. Hao. 2018. Understanding the patterns and drivers of air pollution on multiple time scales: The case of northern China. Environmental Management 61:1048-1061. Home » Liu, Y., J. Wu, D. Yu and R. Hao. 2018. Understanding the patterns and drivers of air pollution on multiple time scales: The case of northern China. Environmental Management 61:1048-1061.