Deepening rivers to allow ships to navigate, spraying pesticides on the lawns, converting a forest to soccer fields, building roads across tundra, replacing riverbeds with concrete bulkheads, and walkways, building golf courses over swamps using pesticides to kill beetles.
Hope this helps! We did the same thing in my class, and that was the answer! But, if that's not what you are talking about, let me know!<span />
