There’s strong evidence, held up in study after study since the 1990s, that exposure to fine airborne particles contributes to respiratory and cardiovascular diseases. This year, epidemiologists ...

As this decade comes to an end, the world has seen progress on many fronts. The poorest countries have greater access to water, electricity, and sanitation (i.e., a toilet). Poverty and child ...

Note: Real effective exchange rates are assumed to remain constant at the levels prevailing during April 26–May 24, 2019. Economies are listed on the basis of economic size. The aggregated quarterly ...