How are s waves and p waves similar? check all that apply.

they shake the ground.
they travel through solids.
they arrive at the same time.
they turn into surface waves.
they vibrate from side to side.

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.

The european union was formally established in

Why is immigration so important today?