our dark future

CO2 is Poison

You may have seen the recent report about surpassing 400ppm for good. You've certainly heard about how CO2 is the main culprit behind climate change. Odds are you haven't heard that the greatest threat from rising carbon dioxide levels may in fact be to our health. To be clear, CO2 is poison (just like Oxygen or water are) at high enough levels. The trick is figuring out what levels (and for how long) cause a detrimental health effects in humans. Perhaps you remember the tense scene in Apollo 13 where Houston has to figure out a way for the astronauts to scrub the gas from their... read more »