To me, the debate should not be if it we did cause global warming, or if it is a natural event. Besides, this is not a "one or the other" kind of question, as the truth is likely in the middle. What should be about is that we try to keep things clean! Pollution is our real problem we are facing, and it is one problem that is entirely our (humans) fault that no one can argue. Trout need clean water, salmon and steelhead need clean water, and humans need clean water. Without clean water, nothing will survive for long. Overfishing and fish farms are another problem that is entirely human caused that needs to be addressed as well. Atlantic salmon that have escpaped the fish farms on the west coast are spawning in rivers in WA, BC, and even have been found in the famous Copper River in AK. In my limited mind, we should be worrying about the problems we KNOW that we caused, and fix them before we argue ourselves blue about if we are to blame for global warming. How sad would it be if we are still argueing about global warming while our fish go extinct due to pullution and over fishing?