Wikipedia defines Butterfly Effect:        

The phrase refers to the idea that a butterfly‘s wings might create tiny changes in the atmosphere that may ultimately alter the path of a tornado or delay, accelerate or even prevent the occurrence of a tornado in a certain location. The flapping wing represents a small change in the initial condition of the system, which causes a chain of events leading to large-scale alterations of events (compare: domino effect).

If we can apply the butterfly effect to our daily recycling habits, the landfills may just disappear in our lifetimes.  Think of all the parks we can add!