What If? Critical Feedback

This critical feedback was really very helpful. I was a little stuck before but I think I have a pretty good idea of what my next step is. They posed more difficult question that I wasn't really thinking about. For example, my idea is to make a half and half picture of a city, what happens if people care, what happens if they don't? But the question is what if people started caring now? Things probably wouldn't look very different. But what if people had cared in the past? Would things look different today? Maybe they would. My idea is an urban environment, I was thinking Boston, and if people didn't care then the air would change drastically is how I would think about it. For example, I was thinking something like the New York smog.