Controversial 400ppm- the warning we didnt listen to

As it seems in recent news, the global carbon emissions have crossed the 400ppm (parts per million). Now there have been debates if it has actually crossed that margin. According to initial reports, it was stated that global emissions have reached 400ppm, although at a Hawaii site it still has not crossed that threshold. I checked up on the Keeling’s curve and saw that the current level stands at 399.88ppm. So the debate basically is that 399.88 were rounded up to 400. 
Now to me honestly 399.88 can be rounded to 400, and as I am a science graduate, I understand the difference between 399.88 and 400. But when it comes to a bigger picture 399.88 and 400 is the same. It may take another 10 years or so to increase another 0.12 ppm to reach the 400.00 level but scientists, environmentalists and many other groups have been trying to make sure we do not reach that stage. As we know that 350ppm is the safest limit and that is a target we should accomplish. It is said global temperatures will rise to 2 degrees Celsius and we will face many climatic changes if we surpass the 400ppm mark.
For the debaters who say we still have not reached the 400ppm, please come to reality. It does not make much of a difference now. 
Those of you, who want to follow the trend of emissions, visit the Keeling Curve.
Get to know more from here.

Photo courtesy to PremacultureNews.

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