[dragonwriter]

> That planet is in whats called a 'glacial age' on the historic time table of the earth.

The planet has been in an ice age the entire time humans have existed on it.

It's probably good for humans for this to continue.

> Yeah, we are rapidly depleting the ice caps (So what?)

The ice caps reduce the degree to which incoming solar energy heats the earth; depleting them accelerates the warming due to greenhouse gas increases. While sufficient warming will reduce the rate of anthropogenic greenhouse gas emissions by killing lots of people, that's not only a suboptimal method of arresting warming if it would work, it doesn't necessarily work to stop warming—you actually need to reduce, not merely stop increasing, greenhouse gas levels to do that. Now, there are some natural processes that do provide some negative feedback, but it's not clear what their limits are even without new human emissions. And we have a dramatic demonstration in the planet whose orbit is nearest to ours of what a runaway greenhouse effect does to a planet that at one point had a climate that would be tolerable.