Uh oh: Take a look at the hockey stick chart used by warmist Marshall Shepherd as he claims that temperatures "went through the roof, relatively speaking" starting in 1850, when he says we figured out how to burn fossil fuels

Slaying the "Zombies" of Climate Science: Dr. Marshall Shepherd at TEDxAtlanta - YouTube

One of the nation's leading climate scientists explains how he goes about knocking down the "zombie theories" that plague our discussions about climate change. What is a zombie theory? Says Shepherd: "It's one of those theories that scientists have refuted or disproven time and time again, but they live on like zombies in the blogs and on the radio stations."  [The chart below is shown at the 5:00 mark]