No major environmental pollution accident has occurred in Tibet, and most of its major rivers and lakes are in a primordial state. 全区没有发生过大的环境污染事故，主要江河湖泊大多仍处于原生状态。
Where a pollution accident occurs to fishery,the matter shall be investigated and handled by the fishery supervision and administration department. 造成渔业污染事故的，应当接受渔政监督管理机构的调查处理。
