Hitting .400 in baseball is cause for celebration, but when it comes to carbon in the atmosphere, hitting 400 parts per million (ppm) signals problems in our relationship with the environment.
As this news article reports, on May 9, we reached 400 ppm for the first time in human history.
Baseball's .400 is significant because of its rarity. In fact, no Major League Baseball player has hit .400 in 72 years. By comparison, the planet has not hit 400 ppm in about four million years.
Human activity continues to release tons of carbon into the atmosphere,
and that carbon makes the planet warmer. One way or the other, our
relationship with the environment will change. Either we make the
alterations necessary stop our carbon emissions, or we prepare for a much
hotter existence filled with growing weather and health challenges.