What is the official collection of all of the federal laws and associated regulations passed by Congress?

Overpopulation puts severe stress on the environment because .

How was the u.s. economy different from european economies following world war 1?

Which of the following is an example of a concurrent power? a. when a group of states work together to regulate interstate commerceb. when a federal law enforcement agency state policec. when a state creates a treaty with a foreign governmentd. when a local government collects taxes on imports