Responding to xenophobic concerns, Congress passed an emergency law restricting immigration in 1921. Among other provisions, the Act established a quota (a proportional share of a total) for nationalities on the basis of their numbers in the U.S. in 1910.
The missing detail is: a quota.
Hey. slash and burn agriculture is most often practiced in places where open land for farming is not readily available because of dense vegetation. These regions include central Africa, northern South America, and Southeast Asia. Such farming is typically done within grasslands and rainforests.
The Marshall Plan (officially the European Recovery Program, ERP) was an American initiative to aid Western Europe, in which the United States gave $13 billion (approximately $130 billion in current dollar value as of August 2015) in economic support to help rebuild Western European economies after the end of World War
