Time was when solar energy was facilely dismissed as impractical, inefficient, and pricey. In recent years, however, innovations in technology, regulation, and financing have resulted in remarkable efficiency improvements and price reductions, thereby reversing the skepticism about this...

Weltweit bestehen gewaltige Unterschiede im materiellen Wohlstand. In der Erforschung nach den Ursachen dieser Ungleichheit wird auch der Frage nachgegangen, welchen Einfluss Naturkatastrophen auf die Entwicklung armer Länder haben. Sind sie ein Grund für ein anhaltendes schwaches...

Food security and hunger are age-old problems that endure today. More than 820 million people are chronically undernourished because they are unable to obtain sufficient food by any means. Chronic malnutrition results from a continuously inadequate diet, reducing physical capacity, lowering...