Pick up and classify trash into the correct type of trash, distinguish by looking at the color of trash and trash, clean up trash in the park, let trash fall without catching it, it will fall to the ground and stay there until cleaning time is over.
Pick up and classify trash into the correct type of trash, distinguish by looking at the color of trash and trash, clean up trash in the park, let trash fall without catching it, it will fall to the ground and stay there until cleaning time is over.