Multilingual people have a big advatage in this world, and young children are ripe for learning. Nothing wrong with speaking more than one language, doesn't mean English can't be you're primary language however.
My kids are 2 and 4, yogabbagabba is among their favorites. When I first saw it I thought it was trash. But I watched a few times with them and realized that it promotes things like music, reading, physical activity, and the like. I don't totally agree with your take on the dirty air thing, it just takes some parenting to further explain things. I can see a cartoon like that convincing a little kid that cars are evil and nobody should drive, we as adults know that's not true. I started talking/teaching my daughter about enery consumption/conservation before she could even talk, as far as I'm concerned they're the key to solving our energy crisis.