Earth and Leaf Editorial – Earth’s Disastrous 10th Tipping Point Has Been Identified Aquatic Deoxygenation    William Grammenos//Getty Images Extract Crossing Planetary Boundaries (PB)—a concept that defines nine potential ecological “tipping points”—could spell doom for ecosystems and humanity’s future on the planet. Of these PBs, humans have already crossed six of the nine thresholds. Now, scientists are arguing that there’s potentially a tenth boundary that’s gone unrecognized, which concerns worldwide aquatic deoxygenation in lakes, reservoirs, oceans, and other bodies of water. “Climate change” is a scary, catch-all term that summarizes all the anthropogenic degradation humans are inflicting on the planet. In reality, climate change is only one of the many…