The Hippo Generation are the ruling elites.

In contrast, of course, we have the Hippo Generation.

But to pauperise a hippo is a different story.

The human juggernaut is permanently eroding Earth's ancient biosphere by a combination of forces that can be summarized by the acronym HIPPO, the animal hippo.

The P, the first one in HIPPO, is for pollution.

Hey, who you got playing the piano there? A hippo?

The HIPPO juggernaut we have created, if unabated, is destined according to the best estimates of ongoing biodiversity research to reduce half of Earth's still surviving animal and plant species to extinction or critical endangerment by the end of the century.