Here’s how the Iranian oil tanker spill off the coast of China stacks up against previous spills

If the Sanchi releases its 1m barrels of oil into the water the resulting spill would be about three times as big as the Exxon Valdez spill of 1989 and double what the Prestige oil tanker released when it sank off the coast of Spain in 2002. Meanwhile, the Deepwater Horizon rig explosion off the southern …