The silent killers are poverty, easily preventable diseases and illnesses, and other related causes. Despite the scale of this daily/ongoing catastrophe, it rarely manages to achieve, much less sustain, prime-time, headline coverage.
Wild et al. , using measurements over land, report brightening since 1990,    and Pinker et al.  found that slight dimming continued over land while brightening occurred over the ocean.  Hence, over the land surface, Wild et al. and Pinker et al. disagree. A 2007 NASA sponsored satellite-based study sheds light on the puzzling observations by other scientists that the amount of sunlight reaching Earth's surface had been steadily declining in recent decades, began to reverse around 1990. This switch from a "global dimming" trend to a "brightening" trend happened just as global aerosol levels started to decline.  
Falling [commodity] prices have meant that large increases in export volume by commodity producers have not translated into greater export revenues, leading to severely declining terms of trade for many commodity producing countries. When the purchasing power of a country’s exports declines, a country is unable to purchase imported goods and services necessary for its sustenance, as well as generating income for the implementation of sustainable development programs.