2. Zero population growth a) Simulate zero population growth by modifying the "slow" scenario above. Hint 1: you need to make population growth even slower. (Big) Hint 2: try changing the parameters "gl" and "dL" to zero. Hint 3: you can check your simulation by plotting the out L to make sure it is a constant. b) How much warming will there be? Is this more or less than the 2 degrees Celsius that is considered dangerous? [ Note: we'll see in a few weeks when we study age structure that even a sudden shift to of parents to having exactly 2 children would not stop population growth immediately.]