What if …
… the planet really is heating up?
We look at flooding in the UK, drought and polar bears on melting ice caps, leading into ideas on cutting pollution such as traffic congestion.

… the sea level keeps rising?
The Thames Barrier may not be high enough. Will we all have to get around in amphibious vehicles?

… everybody rode a bicycle?
How would we have to change the environment if everyone cycled, and would some people mind? Children at a school with cycle routes enthuse about the benefits.