The only way to get gravel is to queue up with cash, and this has fostered the unauthorized mining of gravel from rivers and coastal areas, which has followed illegal pumping of underground water by the aquaculture industry as the activity causing the most serious damage to publicly-owned resources.
買沙石得拿現金排隊等候，也使盜採河川地與海岸沙石，已繼養殖業非法抽取地下水，成為最嚴重傷害公共財的行為。