I would try to educate and aware them if these would be the same situation for next few weeks or months. I would even try to make the place clean. I would even say them not to throw the wastes in the empty plots of our locality. I would even say them that this throwing of garbage in the empty locality is turning into the mess and it makes our place unhygienic and untidy.
hope my answer is useful and mark is useful.............^_^