The total number of active drilling rigs for oil and gas in the United States rose this week, according to new data that Baker Hughes published on Friday, after a 4-rig increase in the week prior.

Here’s a look at oil spill disasters. Spill estimates vary by source. Ten Largest Oil Spills 1. January 1991 – During the Gulf War, Iraqi forces intentionally release 252-336 million gallons of oil ...