In the quiet of the woods the bubbling song of the Ruby-crowned Kinglet erupted, and the high trill of the Brown Creeper signaled its presence. The hormonal drive to breed had birds singing regardless of the weather.
Before the Industrial Revolution, the CO2 count in the Earth’s atmosphere was 280ppm. To prevent future catastrophic changes in the weather, scientists stated we needed to keep that number below 320ppm. Sadly, we didn’t.
