The relationship between atmospheric CO2 levels and climate change is often perceived as a controversial subject. While there’s no real disagreement among climate scientists—around 90% fully agree that human activity is clearly responsible for climate change—in the United States in 2016, barely 50% of the general public came to the same conclusion. Adding to the general confusion, highly active “climate-change deniers” claim that temperature has evolved independently of CO2 atmospheric concentrations through Earth’s history, and that therefore today’s rising CO2 levels are not an issue.
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Source: Phys.org