Why did soviet support of north korea alarm the free world?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

Why did trade along the silk road increase after it fell under mongol control? o people stopped using camels the mongols paved the road o it became safer to travel the mongols were better traders next question ask for

In an industry in which there are several providers of a type of good, why can one business not charge much higher prices for their goods?