What If We Painted Earth White?

Imagine a white picket fence around a white house, with a white driveway and a white car. And it’s not just your house that's white. It's also the road, sidewalks, and every single building. It looks boring and sterile, but it could be the future. And it could help save our world. How much paint would you need? Why would your electricity bill be lower? Why would white paint fight climate change?