Because of course someone with a degree in mechanical engineering is competent to speak globull warming and climate change..................oh wait of course he isn’t.
Actually, a mechanical engineer with a background and emphasis in thermodynamics, heat transfer, fluid mechanics, and diffusion processes (vs. say materials or machine design) is very well equipped to analyze the physical processes at the heart of weather and climate. Much more so than many of the hacks that sign the IPCC reports.
Nobody denies that climate change is real, and that it has an effect on humanity.
But humanity has little if any effect on climate change. The one single factor that has been focused on, the carbon dioxide concentration in the atmosphere, has absolutely ZERO effect on either cumulative increases of planetary temperatures, or pollution in any form.
One of the ABSOLUTELY ESSENTIAL constituents to the life cycle here on earth is the concentration of carbon dioxide. We are talking about parts per MILLION, nowhere near the concentration of water vapor, and certainly far less than the concentration of a very corrosive element, oxygen, which could not be maintained at its current level without continuous replenishment through the chemical and biological regeneration by photosynthesis, converting this scanty supply of carbon dioxide into the free molecular oxygen and carbohydrates, several forms of which make up a large part of our own dietary intake.