500
Is this a global issue or a local issue? What evidence proves your answer?
When some of the oil eventually stops floating on the surface of the water and begins to sink into the marine environment, it can have the same kind of damaging effects on fragile underwater ecosystems, killing or contaminating many fish and smaller organisms that are essential links in the global food chain.
Despite massive clean-up efforts following the Exxon Valdez oil spill in 1989, for example, a 2007 study conducted by the National Oceanic and Atmospheric Administration (NOAA) found that 26,000 gallons of oil from the Exxon Valdez oil spill was still trapped in the sand along the Alaska shoreline.
What is global issue because the animals and organisms affected are essential links in the global food chain?