Glaciers have caused extensive erosion in all of these places except:the Rocky Mountainsthe Rocky Mountainsthe northern United Statesthe northern United Statesthe Appalachian Mountainsthe Appalachian Mountainsthe Cascade Mountains

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

Select all that apply. the reasons some governments fail are: the policies of leaders hurt the people leaders fail to recognize change they don’t restrict freedom enough leaders stay up on the times and change they don’t protect individual freedoms

In general which explains why communist revolutions did not happen