Dear friends: Our allies from The Years Of Living Dangerously just sent us a video informing that there is evidence that levels of CO2 higher than 400 ppm (we already have around 404 ppm of CO2 in the atmosphere) can negatively impact cognitive brain functions of the human brain. You will see in the video that indoors, the concentrations of CO2 are much higher. Below is the link to the video. I had problems attaching it to this update. https://www.facebook.com/YearsOfLiving/videos/1558656197554766/ Keep on sharing our petition.