Problem 1: What are some of the reasons the article gives as to why invasive plants have been deliberately introduced into the U.S.? Discuss at least three of the reasons along with some of the specific plant species that were brought it and used.
Problem 2: The article explains why there have historically been less invasive species introduced into dry lands. Discuss the lack of invasive species in these areas and why has that trend been changing?
Problem 3: The article explains the practice of xeriscaping? Discuss the positive and negative sides to xeriscaping. Where have you seen examples of xeriscaping (your neighborhood, your town)?