Here is the mandatory climate issue. There has been very little on it so far, but it was interesting that the first Green New Deal mention was a criticism of Hickenlooper and not an endorsement.
Hick went after the call from some GND activists for a federal job guarantee We can't "lift every American for a state job." It exceeds what a job security is a bit, but connecting the economy to the climate is an important aspect of the Green New Deal and the new style of climate activism, so it is remarkable that he took that angle. Other candidates will certainly not.