It would be considered an element as nothing has been added or taken away from it
There are some gases in the atmosphere which trap the heat escaping from the Earth and stop it from travelling back into space. These gases are called greenhouse gases. The glass in a greenhouse has a similar effect on the Sun's rays and so it is called the Greenhouse Effect.
Answer:
concrete
2kj for second question
Explanation:
it's gotta be because... let me get back on it.