What does a huge body of air that has similar temperature, humidity, and air pressure

Which of the following best summarizes the point of agreement?

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Name one type of data that h-r diagrams do not show.