Beijing experienced more than 200 days of air pollution categorized as “unhealthy” or worse in 2014, including 21 days that were “hazardous.”
But the degree of concern about climate change varies markedly from country to country.
China’s rapid economic development, its urbanization and its culture will continue to play a role in family size and the population’s gender makeup.
With so much new infrastructure, 62% of urban areas in China with populations over 100,000 have become less crowded -- even as most gained in total population.
Most people in the countries we surveyed – including 11 countries with significant Muslim populations – had negative views of the Islamic State extremist group as of spring.