San Antonio police are investigating how a Solid Waste Management truck ended up in a ravine on the North Side.

More than 100 people have successfully completed the program and received their Commercial Driver's License. Of those graduates, 76 have been hired as full-time employees by the City's Solid Waste Management Department.

The city is already investing more money into tackling the clean-up efforts, but now it’s time to educate the public to stop illegal dumping.

A KSAT Explains viewer wanted to know why San Antonio has so much trash dumped along roads. It turns out it’s a tricky question to answer.