First of all, CO2 is not pollution
Second, if the amount of CO2 consumed by trees is taken into account, the United States and Russia are some of the biggest net consumers of CO2.
I hate CNN.
Why don't they compare the water quality of the Great Lakes to Lake Bykal, which combined represent 60-70% of world's fresh water. You will find that the water in Russia's lake isn't as clean. Is this a result of Communism vs. Capitalism?