Edited sentence: Another example:.Hence, atmosphere CO2 causes tempurature rise.Since the industrial revolution there has been an increase in atmospheric CO2 levels and tempuratures have risen,.The above example is related to the theory promoted by Al Gore prematurely concluding a causal relationship where the relationship between the variables are distinct, however the true variables in the course of environmental changes is much more complex and still not yet fully understood.albeit controversial due to the political nature of Global Warming the same logic is applied