Of all CO2 damage modern humans have caused since our emergence about 250,000 years ago, we have caused 75% of it since 1970 In 2023, we have crossed six of nine boundaries within which human life on Earth will still be possible for future generations. 2009: 3 boundaries crossed 2015: 4 2023: 6 1. Biosphere integrity 2. Global warming 3. Nitrogen and phosphorous 4. Soil loss 5. Freshwater loss 6. Plastic pollution We will soon cross: 7. Ocean acidification https://www.science.org/doi/10.1126/sciadv.adh2458