Google Insights for Search on al gore, global warming, climate change

Google Insights for Search (GIS) is Google's latest functionette on offer. It is fascinating, but not all it could be. More like a tease.GIS provides a graphical output for up to five search terms. Numbers on the graph reflect how many searches have been done for a particular term, relative to the total number of searches done on Google over time. They don't represent absolute search volume