It reduces the amount of oxygen getting to our brain, affecting our ability to think and understand. It also makes us sleepier and more anxious.
As it's in the air we breathe, it can affect everyone from schoolchildren to a business executive, say researchers at the University of Colorado at Boulder, and is more concentrated in indoor spaces—such as a classroom or our own living room—than outdoor areas.
Our ability to make decisions and plan is especially affected by carbon dioxide in our blood, the researchers say, and at very high levels can reduce our decision-making capabilities by 25 percent and complex strategic thinking by up to 50 percent.
Carbon dioxide started to be released into our atmosphere with the start of the industrial revolution, and has reached dangerously high levels today, with a peak of 414 parts per million (ppm) recorded last year. Scientists reckon that levels could reach 930 ppm by 2100 if left unchecked, and this would raise indoor levels to 1400 ppm.
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