[slow, deep breath... Inhale, exhale]
I have been deeply involved in discussions on this very subject for decades now and consider myself pretty well informed on the topic. For today's lesson I don't plan to offer many answers but, instead, ask a number of questions.
First, hit the link & scroll down to the graph:
Q1: If CO2 is the Glowbull Warmening boogeyman some say it is, how is it possible that we are here to argue about it after reaching peak atmospheric CO2 concentrations 16x our current level? (7000ppm vs 420ppm)
Q2: If CO2 is the Glowbull Warmening boogeyman some say it is, how is it possible that, in the midst of 4000ppm+ atmospheric CO2 concentration, there was a global ice age? (~450 million years ago)
Q3: Some have attempted to debunk this graph, saying the numbers are not accurate. Fine. Just for S&G's let's assume an error of 50%. In the mid-Cambrian, that still means an atmospheric CO2 concentration of ~3500ppm, 8x greater than where we are today. And yet, here we are. And yet, there was still a global ice age.
Q4: If atmospheric CO2 concentrations truly drive temperature (and not the other way around), how does one explain the disparity between the relationships on the graph at ~625 million years, 550 million years and 300 million years?
Second link:
www.nps.gov
OK, even the most hardcore warmists have difficulty justifying any date prior to 1950 as possessing a high enough atmospheric CO2 concentration to effect global temperatures.
The article notes the furthest extent of the glacier at Glacier Bay at the end of the Little Ice Age in 1750 was well into Icy Strait. Furthermore, the article notes that 130 years later, the glacier had retreated 45 miles (5 + 40).
Q5: With atmospheric CO2 concentrations around 250ppm in the 18th & 19 century, the Glacier Bay glacier retreated 45 miles in 130 years. If CO2 is the Glowbull Warmening boogeyman some say it is, how is it possible that, in the face of "unprecedented" rates of increasing atmospheric CO2 concentration and a current peak around 420ppm, the glacier has only retreated an additional 20 miles in 140 years?
Questions, questions, questions...
I could go on at length, but will reserve further comment for now.