An environmental writer said that worst-case climate scenarios are now obsolete, since “if countries achieve the net-zero pledges that they have already put on the table, warming will stay under 2°C.”
What are the chances that countries will meet their pledges‽ So far, the worst GHG emitters, including the US, are nowhere near being on track with their pledges. According to Climate Action Tracker, countries are “a long way from converting net-zero targets into policies and actions that will result in real-world emissions reductions.”
According to former NASA scientist James Hansen, there is already enough heating potential in the atmosphere to mean between 6° and 7°C warming by the end of the century — possibly up to 10°C [18°F].
Worth a read.