1. Positive feedback loops in the environment
When rising temperatures alter the environment in a way that intensifies the rate of overheating, a positive feedback loop is created. For instance, the melting of permafrost in Arctic tundra may trigger a release of methane from frozen hydrates. Methane is a highly potent greenhouse gas and its increased concentration in the atmosphere will likely speed the rate of global heating – so releasing more methane.
– Down to Earth newsletter
^ Positive as in reinforcing. Not positive in general.