![Indoor Carbon Dioxide levels could be a health hazard,is that true?_NEWS_Shenzhen Heiman Technology Limited Indoor Carbon Dioxide levels could be a health hazard,is that true?_NEWS_Shenzhen Heiman Technology Limited](https://www.heimantech.com/upload/2021/08/20210806160836_920.png)
Indoor Carbon Dioxide levels could be a health hazard,is that true?_NEWS_Shenzhen Heiman Technology Limited
![Our current geologic period (Quaternary) has the lowest average CO2 levels in the last 600 million years - CO2 Coalition Our current geologic period (Quaternary) has the lowest average CO2 levels in the last 600 million years - CO2 Coalition](https://co2coalition.org/wp-content/uploads/2021/08/CO2_6.jpg)
Our current geologic period (Quaternary) has the lowest average CO2 levels in the last 600 million years - CO2 Coalition
![Climate change: Carbon dioxide levels are higher than they've been at any point in the last 3.6 million years - CBS News Climate change: Carbon dioxide levels are higher than they've been at any point in the last 3.6 million years - CBS News](https://assets3.cbsnewsstatic.com/hub/i/r/2021/04/10/c6044a20-2268-4f05-9e02-32d8ea1aca0c/thumbnail/1280x720/fbd55f70bdc97c3645fe3e197812189a/cbsn-fusion-greenhouse-gas-levels-surged-in-2020-noaa-says-thumbnail-689249-640x360.jpg)
Climate change: Carbon dioxide levels are higher than they've been at any point in the last 3.6 million years - CBS News
![June's global average concentration of atmospheric carbon dioxide (#CO₂) was about 419 parts per million (ppm), a roughly 50% increase since 1750 due to human activities, such as burning fossil fuels and June's global average concentration of atmospheric carbon dioxide (#CO₂) was about 419 parts per million (ppm), a roughly 50% increase since 1750 due to human activities, such as burning fossil fuels and](https://coyotegulch.blog/wp-content/uploads/2022/07/co2_left_061720.gif)
June's global average concentration of atmospheric carbon dioxide (#CO₂) was about 419 parts per million (ppm), a roughly 50% increase since 1750 due to human activities, such as burning fossil fuels and
![Carbon Dioxide Levels Reach Unprecedented Highs: But Catastrophic Climate Change Can Still be Avoided Carbon Dioxide Levels Reach Unprecedented Highs: But Catastrophic Climate Change Can Still be Avoided](https://blogs.worldbank.org/sites/default/files/climatechange/Alan-Miller-CO2-Concentration-Graph.png)