What are ways that humans can lower biodiversity as they interact with the environment?

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!

The economics south america are similar because they have a lot of production and selling similar to wat