Look at the list of things that humans will have to do before they can start living on Mars. Listen again and match the acyions with the results.
Example: 1-d)
ACTION RESULT
1 plant trees 
2 grow algae
3 produce an agricultural programme 
4 melt ice 
5 plant gigantic mirrors around the planet oxygen
 RESULT
a)make oxygen
b)form oceans
c)heat up the planet
d)get a constant supply of 
e)produce their own food 

REPEDE VA ROGG!!! IMI TREBUIE PANA MAINE!!!!!DAU 30 DE PUNCTE