A laser gun, connected to a computer and set up in a seven-ton truck, is being used at York University to measure pollution and analyze weather condit(...)

Original Toronto Star caption: A laser gun; connected to a computer and set up in a seven-ton truck; is being used at York University to measure pollution and analyze weather conditions. Glen rose; a physics technologist at York; operates the equipment. It fires a laser ray for a fraction of a second to read dust; clouds; pollution and humidity.