These two Illustrations of a town with polluted and clean air are telling a story about air pollution in urban areas—the illustrations created for Cambridge University Grammar and Beyond Student Book 2. The unit of the book is talking about future probability in life today and life tomorrow.

Sometimes we need a reminder of what is essential in our lives. Therefore, it makes perfect sense to compare what has been with what should be. The World is teetering on the edge because our emissions are causing pollution, and this is leading to unhealthy conditions for humans and animals alike.

Imagine yourself in the countryside, breathing in fresh cool air, and then imagine the same breathing experience in a city. Is the air clean? Probably not. But it could be. When we consider how we treat our cities and our airspace, we are considering how we treat ourselves and our legacy. What do we want to leave for future generations? At the very least, we should leave healthy living conditions.

Sometimes a picture says a thousand words. In this case, two images tell the story best. In one illustration, we see our current living conditions. We are smothering in pollution. And in the next, we see the possibilities for the future: clean air and fresh spaces. See what the World is telling us and use this art to share the options with others.

Grammar in the Real World section is discussing which the Unites States current trends will likely affect our lives tomorrow. Which direction will be most important for our society in the future?

 Air pollution is continuing to be a problem as well as birthrate is going down in the US.