Not sure if this is a "Select all that apply" question, because most of these could work. However, I'm going to assume the answer is easy movement on people, products, and ideas.Improve transportation has allowed better import and exports, faster transportation cross country, even around the world. At the same time, the answer could be increase greenhouse gases and increase pollution, because they release toxic fumes through exhaust. So, if it's a Select all that apply question, i would select those three.
