A couple of points to ponder.......
following the explosion that destroyed BP's Deepwater Horizon well, 4.9 million barrels of oil were spilled, resulting in havoc in the area (and a huge political fuss).
Yet, with an average consumption of more than 20 million barrels of oil per day, industry and consumers across the US would have gobbled up the entire spill in just a few hours.
It puts the enormous consumption of oil into perspective.

Another fascinating fact (extracted from New Scientist), Eyjafjallajökull, the volcano that closed Europe's airspace and stumped English-speaking newscasters trying to pronounce its name, is estimated to have emitted between 150,000 and 300,000 tonnes of carbon dioxide a day.
That's less than the grounded flights would have emitted, making it the first carbon-negative volcano!

John