I have to admit that I’ve been thinking about the climate change issue for 25 years now, dating back to my days as a congressional staffer working on the Clean Air Act Amendments of 1990. At the time, global warming was gaining momentum as an issue, but media-magnified predictions of the coming global ice age from the 1970s were still relatively fresh memories.
Even with all of the time I’ve invested in the issue, including substantial reading, I still have far more questions than answers on the issue.
- Why has earth been much warmer in many past periods over the billions of years of earth’s existence when man-made emissions mattered little for most of this time?
- How devastating are the consequences if we are contributing to a warming of the earth? I’ve seen many predictions. I’m not convinced yet of their accuracy.
- Are the costs of mitigating any warming (moving people) cheaper than preventing it?
- Are there food production benefits if earth warms and more CO2 is in the atmosphere?
- When we look at temperatures having risen compared to pre-industrial levels, how certain are we that most or all of this increase is not the result of natural variability in earth’s temperatures? How certain are we that we are not confusing correlation with causation? [Continue reading]