http : //www.youtube.com/watch ? v=_2vpcabwjiy [ 108 ] detection of inactive bugs http : //en.wikipedia.org/wiki/nonlinear_junction_detector [ 109 ] once the california zero emission mandate , designed to help protect children health from smog , was revoked in 2002 , all the general motors electric cars were recalled and crushed , despite strenuous protests from their leaseholders .