For example, the most heavily damaged forests of France and Germany lie downwind from Britain's centers of heavy industry; emissions from heavy industry in the American Midwest get blown towards the northeastern United States and neighboring Canada.
如德、法損失最慘的森林，就處於英國重工業區下風；美國中西部重工業區的廢氣，則吹向美國東北角與鄰國加拿大。