Blacktop a Major Cause of Warming?

Moonbattery points out another chink in the armor for the global warming crowd: bias in collecting temperature data. Many sites used to measure temperature have changed significantly over time: blacktop, buildings, etc (do you think the site on the left changed at all in the last 100 years? Picture from moonbattery). This artificial warming has nothing to do with climate change. It is unlikely that a site will move toward a cooling bias, the opposite is far more likely. These sites indicate a slight warming trend over the last 100 years, but even if we accept this data as perfect, we have no idea how much of this .6 degree increase is due to carbon dioxide emissions, precipitation, or solar activity, among other things. Considering that the data is suspect, there may not be any climate change occurring at all.