It’s great that at last, BP seems to have managed to stem the flow of oil into the Gulf of Mexico. Today, we also have the news that 75% of the oil has either been dispersed, collected or has evaporated. However, that still leaves a huge amount of oil out there. Latest estimates suggest that 4.9 million barrels of oil have leaked into the Gulf of Mexico since the Deepwater Horizon blew up in April, killing eleven oil workers. 4.9 million barrels sounds like a lot. Well, it’s actually 778,610,000 litres. If it were fuel, it would fill the tanks of about 15.5 million cars! So even if there’s just 25% of the spilled oil left in the Gulf, that’s still nearly 195 million litres of oil loose in the sea.
But what has it meant for the environment? What we do already know is that something over 3,000 seabirds have been washed up dead on the beaches. This contrasts with the 600,000 or so killed by the oil spill in Alaska caused by the Exxon Valdez in 1989. Over 500 sea turtles and 64 dolphins have also been found dead. The impact on the coastal grasslands has been patchy, but where oil has come ashore and damaged the grasses, green shoots of recovery are already being seen.
However, many of the effects of the spill will be seen in the longer term, not in the immediate aftermath. The impact on the shrimp fisheries will not be known for some time, nor perhaps even more worryingly, the effects the spill may have had on the bluefin tuna living in the Gulf. So for now, it’s a question of watch this space. One thing is certain though – the environmental impacts could have been far worse.