And the reason climate models show 1880 - Present, and not 1840 - Present, is because in 1840, it was hotter in rural areas than it is now. Why does that matter? Because we weren't industrialized and polluting in 1840 like we are now. Not to mention the latest IPCC report completely removed the idea behind the urban heat island effect which clearly shows this is politicized science and not the alarmist, leftist, tree hugging catastrophe that everyone says it is. Be a good steward of the environment. Solar Panels for your home, hybrid cars, walk when you can, recycle (but not glass, that pollutes, we ain't running out of sand anytime soon) and for fucks sake, don't buy into the hype started by a guy that owns a private jet and a home in miami that sits at sea level and sells his channel to people from a major oil producing company.