1. Extreme enviroments Sahara desert

4. What is an extreme environment An extreme environment is one where it is hard for people (or other forms of live) to survive. Extreme environments can be as vast as a desert or as small as a mountain peak.

5. How people react to extreme environments People react to extreme environments by changing from one environment to another. For example people on earth have 21% oxygen. On mars there is only 0.13% oxygen. This means that on earth you would breath in more oxygen than co2. On mars you would breathe in more co2 than oxygen. too much co2 would suffocate us.