POWERLINE, John Hinderaker: In the debate about serious man-made global warming, there are two types of evidence. The first is the raw material of science, observation. The second is climate models created by alarmists for the purpose of generating scary scenarios. Anyone with the slightest acquaintance with science understands that observation (type 1) trumps theory (type2). Which is a serious problem for the warmists, since temperature records show that their models are wrong.
Jay Lehr, Ph.D. Science Director at The Heartland Institute: The media has promoted unwarranted fear and unmitigated arrogance as to man's impact on his climate. While temperatures have fluctuated, today's Earth temperature is below the average for the past 5,000 years. 900,000 years of ice core temperature and carbon dioxide content records show that CO2 increases follow rather than lead increases in Earth temperature. This is logical because the oceans are the primary source of CO2, and they hold more CO2 when cool than when warm, so warming causes the oceans to release more CO2.
Douglas Lightfoot, Mechanical Engineer, Founder, Lightfoot Institute, http://www.thelightfootinstitute.ca: A new study by H. Douglas Lightfoot and Orval A. Mamer finds that the effect of carbon dioxide (CO2) on atmospheric temperature and climate is so small it is negligible. The study titled Back radiation versus carbon dioxide as the cause of climate change presents an original graph by the authors showing the concentration of water vapor plotted against back radiation. This is an important contribution to the discussion about CO2 because it allows an accurate comparison of the warming effect of water vapor with the known warming effect of CO2.
Douglas Lightfoot, Mechanical Engineer, Founder, Lightfoot Institute, http://www.thelightfootinstitute.ca: The scientific evidence used in this study is robust and comes together from many reliable sources. Evidence is connected in new and innovative ways to expand and clarify the overall picture of climate change as experienced by the Earth and its inhabitants. Because of this, significant parts of the evidence and how it is used will be new and unfamiliar to many scientists. Nevertheless, the results and conclusions of this study are important to the wellbeing of everyone on Earth.