A/C for the pet lover on the road

Many of us travel with our pets and the one problem we have is leaving our animals in the car while we fuel ourselves. Oftentimes, the car is (as is well known) too hot to leave an animal safely. I would like to see this problem fixed. Therefore, along with my other idea of having an onboard kennel which pops out from the trunk when the seat is put down, I would like to see a safe way to keep the car cool on hot summer days while Mom, Pop, and kids grab at snack and take a break from driving. The a/c unit must also have an outside alarm that would go off if it broke down; much like a horn that continually honks until someone pays attention.