CHANGE: Walmart announces infant car seat designed to prevent hot car deaths. “In most new cars, an alert sounds if a driver or passenger is not wearing a seat belt or if headlights are left on. Using a similar idea, a sensor on the infant seat harness triggers a series of tones if a child is still buckled in when the ignition is switched off. The feature is meant to remind drivers who might forget that a child is in the vehicle.”

This is kid stuff. You need a motion sensor in the car, coupled with a thermometer. When the temp gets above 100 degrees and the sensor shows the car’s occupied, the windows should automatically roll down, or the AC come on. Coming soon to Teslas, probably.