Each diagram should have a FAQ with answers to questions like ekianjo's, otherwise a conspiratorial attack is too easy.
The "pro" side should read and learn from forum discussion like this (other issues pointed out: "All of the charts should use the same time scale. It's confusing and misleading to use different scales for each", "I wonder why the chart for CO2 concentration starts at 1960 vs 1850 for the global mean temperature difference", "Interesting graphs, but it's a little confusing that all but one of them use difference of the metric (i.e. relative values) instead of absolute values -- what and when are the differences relative to?"), making notes on criticisms and improving their presentations. I think "The definition of insanity is doing the same thing over and over again, but expecting different results" has some relevance here.
The "pro" side should read and learn from forum discussion like this (other issues pointed out: "All of the charts should use the same time scale. It's confusing and misleading to use different scales for each", "I wonder why the chart for CO2 concentration starts at 1960 vs 1850 for the global mean temperature difference", "Interesting graphs, but it's a little confusing that all but one of them use difference of the metric (i.e. relative values) instead of absolute values -- what and when are the differences relative to?"), making notes on criticisms and improving their presentations. I think "The definition of insanity is doing the same thing over and over again, but expecting different results" has some relevance here.