A Tale of Two Climates: One Real, One Imaginary (Guest: Bill Pekny)

The climate was not stagnant before human carbon dioxide emissions. Rather, Earth’s climate is consistently changing across a variety of timescales. It has been warmer and cooler than it is today. There is no evidence we are in the midst of a climate crisis driven by carbon dioxide emissions. Earth’s present warming is similar to the warming experienced during every previous interglacial cycle throughout its history. Carbon dioxide is not a pollutant. It’s necessary to life.