An electric garbage truck cleans a road at a ceremony in Luohu District on Tuesday when two electric garbage trucks were put into service on a trial basis in Luohu and Futian districts. Such garbage trucks will gradually replace the fuel-powered trucks in the future. Currently, the city has a fleet of 1,300 garbage trucks. Official figures show that vehicle emissions are one of the main causes of air pollution in the city. Liao Wanyu