some people argue that its explanation 1 and 2, not 3 and therefore "not our problem"
And they have a somewhat valid point. The data shows warming, it cannot show the cause of the warming. There is some interesting data showing correlation between carbon emissions and temperature rise--but even then it doesn't establish a causation. This same problem came up when we started noticing trends in smoking and lung cancer. The trend was there, but the only way to prove causation would be to carry out an experiment were some randomly chosen people smoke and a control group does not and see if the smokers get more cancer.
Most scientist (all but a very small handful) agree that it is human caused because of the accompanying trends (like carbon emissions).
some people argue that its explanation 1 and 2, not 3 and therefore "not our problem"
And they have a somewhat valid point. The data shows warming, it cannot show the cause of the warming. There is some interesting data showing correlation between carbon emissions and temperature rise--but even then it doesn't establish a causation. This same problem came up when we started noticing trends in smoking and lung cancer. The trend was there, but the only way to prove causation would be to carry out an experiment were some randomly chosen people smoke and a control group does not and see if the smokers get more cancer.
Most scientist (all but a very small handful) agree that it is human caused because of the accompanying trends (like carbon emissions).