Meet Justine McKeen. She's the Queen of Green She talks a little too much, bosses a little too much and tells the truth, just not all at once. She's trying to save the planet, one person at a time, and when she decides to get something done, it's a lot of fun. In "Justine McKeen, Walk the Talk," the second book in the Justine McKeen series, Justine decides there are too many cars idling in front of her school. So she comes up with a solution that should help keep the air cleaner. But she soon discovers not many adults trust her crazy ideas.