Depending on who you believe, the scale on the Niger Delta might be slightly out. Not that it changes the overall validity of your argument.
One estimate from Google said 1.5 million tons of oil in Nigeria over 50 years. So that's something like 1.7 billion litres in 50 years, 34 million litres a year. PBS's estimate for BP's Spill, on the OP site, seems to cover the gamut of legitimate estimates put forward to date. It comes out at a range of 79-704 million litres in the Gulf so far.
Of course comparing them in this way is ultimately absurd, which is why I think your original point is still a really valid one.
One estimate from Google said 1.5 million tons of oil in Nigeria over 50 years. So that's something like 1.7 billion litres in 50 years, 34 million litres a year. PBS's estimate for BP's Spill, on the OP site, seems to cover the gamut of legitimate estimates put forward to date. It comes out at a range of 79-704 million litres in the Gulf so far.
Of course comparing them in this way is ultimately absurd, which is why I think your original point is still a really valid one.