Carbon dioxide in the atmosphere hit 406.27 parts per million (ppm) on Feb. 8. That is the highest ever daily average as determined at the Mauna Loa Observatory in Hawaii. Mauna Loa is where the Scripps Institution of Oceanography takes daily atmospheric measurements (scripps.ucsd.edu).
The milestone level of 400 ppm was passed on what seems to be a permanent basis some weeks ago.
Current daily readings:
Feb. 15, 2016, 403.61 ppm
Average for the month of January 2016, 402.52 ppm
Average for the month of January 2015, 399.96 ppm
The 2016 election for President of the U.S. will matter for the next 10,000 years because "a considerable fraction of the carbon emitted to date and in the next 100 years will remain in the atmosphere for tens to hundreds of thousand years." That comment comes from the Vox Energy and Environment web site, which calls itself "a public citizen energy blog."
Either we elect someone who will work to reduce our dependence on fossil fuel or we won't. Our action will influence decisions to be made by other countries about adopting or continuing carbon-reduction practices. As we go, so goes the world.