From NASA: Atmospheric carbon dioxide (CO2) levels are higher than at any time in the past 400,000 years. During ice ages, CO2 levels were ~200 ppm, and during the warmer interglacial periods, ~280 ppm. In 2013, CO2 levels surpassed 400 ppm for the 1st time in recorded history. This recent rise in CO2 shows a constant relationship with fossil-fuel burning, and can be well accounted for based on the premise that ~60% of fossil-fuel emissions stay in the air.
@cmskiera
But there's no such thing as climate change
You scamp, @Idissent 😉