>This is great, and should be done. But we also need to stop it happening again. The patch was discovered 27 years ago (1997). So, $7 billion to clean it up, a

>This is great, and should be done. But we also need to stop it happening again. The patch was discovered 27 years ago (1997). So, $7 billion to clean it up, and then $250 million a year to keep it clean thereafter