What are some advantages of solar energy? what are some disadvantages?

Several billion years ago which gas was the least prevailant in the atmosphere

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.