Generally speaking the War Powers Resolution of 1973 negatively affected the power of the US president by making it so that the President could not commit troops beyond a certain point without Congressional approval.
War and violence. While epidemic disease was by far the leading cause of the population decline of the American indigenous peoples after 1492, there were other contributing factors, all of them related to European contact and colonization. One of these factors was warfare.
I would say 3, but in fact, it has at least a dozen climatic zones.
The three principal climatic zones are:
1) The tropical lowlands of the Caribbean region, wich are hot and humid
2) The interior uplands of the ishtmus, where the temperature climate is cool and damp in the valleys and plateaux, to cold in the mountains.
3) The lower Pacific slope and coastal plains, wich have hot and dry conditions
