The ONLY way out is technology. People will NEVER change their need/greed for power. Until we have free unlimited electricity (fusion?) and with it the ability to suck CO2 out of the air nothing will change.

"This is the first time in human history our planet's atmosphere has had more than 415 ppm CO2 since before modern humans existed millions of years ago. We don't know a planet like this." Ha ha haaaa! Right. The desperate cries of an alarmist. CO2 was much higher millions of years ago and flora and fauna managed to survive and thrive. According to the Orbiting Carbon Observatory, CO2 levels differ by 15 ppm or more all over the earth and Mauna Loa happens to be in an area where concentrations appear to be higher than other places. So "average" CO2 over the globe is certainly not 415 ppm. But at Mauna Loa it is. Atmospheric levels of CO2 have been going up steadily since we've been measuring it. Most people attribute it to burning fossil fuels; however CO2 levels have fluctuated a lot over millions of years, long before humans were burning fossil fuels, and no one yet understands what caused those fluctuating levels. Until that is known, it is premature to blame all of the recent increase on humans. Since CO2 is a benign trace gas and essential for all plant life, to say that 415 ppm (or 405 ppm) is somehow worse than the arbitrarily-chosen 280 ppm is not based on any objective scientific data. It's mere speculation by alarmists. In fact, the higher levels of CO2 have, objectively, improved plant efficiency and greened the planet. We call that winning.

No mention of the other gases in the atmosphere and their concentration, which I find odd. Also, I am still waiting for someone to explain exactly HOW CO2 causes warming.

CO2 optical saturation happened over 10 years ago. More produces no additional warming. "All of human existence" is a tiny blip on the geohistory of climate. Less than one ice age. Stupid people believe stupid things.

Did anyone else note that they are comparing CO2 levels at the south pole to the levels on an actively erupting volcano??? If they were looking for an increase, how about comparing comparable locations??? Also claiming that the levels have never been this high during the age of humans may not be true. Claiming that 350ppm is safe may well not be true either. Unfortunately, science and politics are being blended in a very deceptive manner. The debate over cigarettes went on for years just like the current debate over "Roundup" will. Scientists saying what they are paid to say.

@Crazyoldranga: Svante Arrhenius first proposed the link over 100 years ago. Look him up. @aksdad: the point of this article is that this is the highest atmospheric CO2 content in human history. Clearly the earth has been here for billions of years, and life forms also for much of that time. But humans haven't, and humans in the current highly-biosphere-dependent form for only thousands of years. You're fooling yourself if you think that the way we live now will survive another hundred or so years. @RobertE: Arrhenius' equation for heating of earth's surface doesn't have a limit, and it's by no means clear that limits associated with laser radiation apply to solar irradiance.

400 ppm is 0.04%. Water vapour in the atmosphere varies between 1 and 4%. It too is a green house gas, cloudy days are cooler than clear sunny days. Cloudy nights are hotter than clear nights. So let's start a champaign to tax everyone on the planet for water vapour in the air. That should be fun. Al Gore's movie "an inconvenient truth" tried to show the connection between global warming in the past to CO2 levels, only problem was the CO2 levels followed the global warming, it didn't lead it. The sun is not a constant source of thermal radiation, it has 3 main clock cycles, the solar sunspot cycle of 11 years, the Gliessberg cycle of 87 years (varies from 70 to 100 years) and the grand cycle of 12068 years. Do a search for Carrington event 1859, and solar event 7 July 1958. That should be the focus of alarm. I also think the image of the water vapour coming out of the cooling towers reinforces my point of the relative insignificance of CO2.

I find this article interesting, but probably false. It appears that fear and dread of the evil CO2 is bogus to many, including Princeton professor Maller. It is Maller's belief that there is actually a shortage of CO2 in the atmosphere.
https://youtu.be/U-9UlF8hkhs
Climate change? There may be some, but no one seems to want to talk about the elephant in the room, namely government's use of chemtrail sprays and HAARP to use weather as a military weapon against humanity.

Since 415 ppm is well above the "safe" 350 ppm, then may I conclude that it's too late to do anything? Even if all humanity were to vanish this day then, according to the experts, the earth is still doomed. I can no longer abide the doomers unless and until they promote nuclear power as the energy source to replace carbon fuels. Otherwise, I cannot believe they are all that serious about a supposedly doomed earth and that the truth of their agenda lies elsewhere.

This article admits that there is "something of an unknown is what effect this will have on the planet". Congrats on that point. Most writers will jump from "something is changing" to "catastrophe!" without any evidence for the later. I'm on somewhat the same page as guzmanchinky, except more optimistic. One thing that surely will NOT help: the U.S. Congress. Legislatures of all stripes are good at only one thing: funneling money and privilege to themselves and their cronies.