Global Warming?

There are those who take strong stands on both sides of the "Global Warming" issue and produce reams of data pro and con proving their side and disproving the other's position.

It seems the weakest data springs from global and local temperature data. Where do you place temperature probes so that they reflect truly sound temperatures? Temperatures vary from year to year and decade to decade. What does reflect trends in climate are ice fields; on the ocean and on mountains. Trends in growth of forests, migration routes of birds, and populations of insects tell more over time than temperature data over the globe.

Here in Montana I have seen over the years the disappearance of ice in the mountains and milder winters, more extreme storms, and differences in precipitation seasonally. By news reports I have heard of glaciers disappearing on mountains known historically to have large ice fields on them. Greenland's ice is receding like never before. Kilimanjaro, Mt. Fuji, and Canadian Rockies glaciers will be gone in a decade if trends continue.

No one can claim that the sun is the reason for the sun has been quiet for some time now. Humans began burning coal in the 1700's and coincidentally Alaska's glaciers began to recede in 1795. Cause and effect?