Green groups say not enough known about how oil drilling may affect whales and seals; feds say any risk is negligible.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/wtvUIwS9nL4" height="1" width="1"/>
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Green groups say not enough known about how oil drilling may affect whales and seals; feds say any risk is negligible.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/wtvUIwS9nL4" height="1" width="1"/>