 But smaller towns are also growing and getting dirtier. And that includes Eteni in Kenya, the revealed training center for some of the world's greatest runners like Kenyan superstar Kipchoge. For the last 20 years, actually, it has really changed. The first 10 years, it was really cold, and then another four years. The three years, it was a little bit bad because where we are trained, actually, forest was really cut.