Because we have not found another planetary system like our own, ...

[panfilo]

Because we have not found another planetary system like our own, we can conclude that our Solar System must be quite unusual.
 
  Indicate whether the statement is true or false

Question 2

Without the greenhouse effect operating in our atmosphere
 
  A) We would not have to worry about any warming problems in the future.
  B) Earth would have an average temperature of -23 degrees Celsius.
  C) The ice in the polar regions would have melted long ago.
  D) The ozone layer would not be weakening.
  E) The Earth would have become much more like Venus long ago.

[mceravolo]

Answer to Question 1

FALSE

Answer to Question 2

B

[panfilo]

Excellent

[olderstudent]

Gracias!