Despite Historic CO2 Levels, There Has Been No Global Warming For Eighteen Years

I guess this is important for someone: the 400 parts per million. Bloomberg is reporting:

The amount of carbon dioxide in the atmosphere averaged more than 400 parts per million throughout April, the first time the planet’s monthly average has surpassed that threshold.

For what it's worth, we are now in a period of global cooling. Despite 400 parts per million CO2 in the atmosphere.