problem of reduction
131Social Security debate (United States) — This article concerns proposals to change the Social Security system in the United States. Social Security is a social insurance program officially called Old Age, Survivors, and Disability Insurance (OASDI), in reference to its three components …
132Economics of global warming — This article describes the economics of global warming and climate change. Contents 1 Definitions 2 Climate change science 3 Scenarios 4 Trends and projections …
