It is a horrible messy and dangerous business. But looking at the complete lack of safety, just a modicum of training and equipment would appear to dramatically improve the workers. Hard hats, walkie talkies, safety cones and gloves, some of the simplest cheapest things you could think of. I'm a total libertarian on the subject and feel that countries need to go through a wretched industrialization period and then safety and REASONABLE environmental standards will crop-up.