The results of the first experiment described in the article are completely compatible with previous knowledge found in "death and dying" research. The same dynamics of denial function when one feels doomed. You can't expect climate scientists to offer solutions, they can only report on what they observe.
...if scientists and advocates can communicate their findings in less apocalyptic ways, and present solutions to global warming, Willer said, most people can get past their skepticism.The problem with offering solutions to the climate crisis is that real, effective solutions are incompatible with the ruling political-economic system of capitalism. Therefore no convincing solutions can be offered by the propaganda organs of the ruling class. Hence, their propensity to engage in denial or to offer false solutions which are usually unconvincing and without scientific support.