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Earth's Carbon Dioxide Levels Reach Highest Point In 800,000 Years (washingtonpost.com)
An anonymous reader quotes a report from The Washington Post: For the first time since humans have been monitoring, atmospheric concentrations of carbon dioxide have exceeded 410 parts per million averaged across an entire month (Warning: source may be paywalled; alternative source), a threshold that pushes the planet ever closer to warming beyond levels that scientists and the international community have deemed "safe." The reading from the Mauna Loa Observatory in Hawaii finds that concentrations of the climate-warming gas averaged above 410 parts per million throughout April. The first time readings crossed 410 at all occurred on April 18, 2017, or just about a year ago. Carbon dioxide concentrations -- whose "greenhouse gas effect" traps heat and drives climate change -- were around 280 parts per million circa 1880, at the dawn of the industrial revolution. They're now 46 percent higher. According to Scripps Institute of Oceanography, this amount is the highest in at least the past 800,000 years. "We keep burning fossil fuels. Carbon dioxide keeps building up in the air," said Scripps scientist Ralph Keeling, who maintains the longest continuous record of atmospheric carbon dioxide on Earth. "It's essentially as simple as that."
Those graphs all over-estimate climate sensitivity by a factor of 2 or 3; recent peer-reviewed data points to 1.3 to 1.6 deg K for doubling of CO2, not the 3+ deg K as used by all the IPCC models. Perhaps that's why the models don't match the data, and run quite a bit hotter than actual data.
Browsing at +1 - no ACs, I ignore their posts. So refreshing!
Been said a million times before: CO2 is not a pollutant. It's needed for plants to grow. The current CO2 levels are so low it's amazing plants survive at all. We'd be much better off if CO2 levels tripled from current levels.
All this sky is falling bullshit is about raising taxes and the socialist elite controlling the rest of us.
If you're not socialist elite and worried about CO2 levels, you're just one of their sheep.
Plants need water to grow, therefore plants cannot be overwatered.