There are 101 trees lined up in a forest, each absorbing 24 pounds of carbon dioxide per year

There are 101 trees lined up in a forest, each absorbing 24 pounds of carbon dioxide per year. Every other tree is cut down and replaced with an animal that gives off 60 pounds of carbon dioxide per year. A few months later, every third tree or animal is replaced by a different type of tree that takes in 40 pounds of carbon dioxide per year. Finally, a new animal that produces 30 pounds of carbon dioxide per year replaces every fourth tree or animal. </o:p>

A) In the year following the last set of changes, how much carbon dioxide is contributed to the atmosphere due to the organisms in the forest?</o:p>

B) How much carbon dioxide would the original tree have to absorb to create a stable forest with no carbon dioxide by added or taken away from the atmosphere? 

There are 101 trees lined up in a forest, each absorbing 24 pounds of carbon dioxide per year. Every other tree is cut down and replaced with an animal that gives off 60 pounds of carbon dioxide per year. A few months later, every third tree or animal is replaced by a different type of tree that takes in 40 pounds of carbon dioxide per year. Finally, a new animal that produces 30 pounds of carbon dioxide per year replaces every fourth tree or animal.

A) In the year following the last set of changes, how much carbon dioxide is contributed to the atmosphere due to the organisms in the forest?</o:p>

B) How much carbon dioxide would the original tree have to absorb to create a stable forest with no carbon dioxide by added or taken away from the atmosphere? </o:p>