Moments of Joy: The Undiscovered Country

They went out with a big global warming episode, only since it was prehistoric, they used the Ice Age as their point of reference.Main character Earl worked for the Wesayso Corporation (Get it?Get it?), and in the finale, he helped cause an environmental disaster.Basically, he wipes out a species of beetle that is supposed to keep the vines from getting out of control.They use defoliant to kill the vines instead, and so on.The point is, Earl and his boss end up blocking out the sun and bringing about the Ice Age.