China’s largest reported oil spill had more than doubled by today…prompting an environmental official to warn the sticky black crude posed a “severe threat” to…water quality…The oil was spread over 165 square miles of water five days since a pipeline at a busy northeastern port exploded… At least one person died in cleanup efforts…Zhang Liang, drowned Tuesday when a wave threw him from a vessel and pushed him out to sea…The cause of the explosion that started the spill was still not clear. The pipeline is owned by China National Petroleum Corporation (CNPC)…