Set in the fictional world of Azeroth, it added new playable characters, such as Death Knights, as well as a new territory, Northrend, made up of icy wastelands and perilous dungeons.
He spent more time and energy avoiding the world, it was sometimes said, than most people do in embracing it, and his elusiveness only added to the mythology growing up around him.
The need for more energy to power larger cities and economic growth therein leads to the construction of dams, the consequent flooding of ecosystems, and increased emissions of pollutants.
So if you end up adding like a bunch of new features in what you say simply a revision of an existing application, your existing user base gets all of that new functionality for no money.
What's more, demand for animal products in developing countries is growing so fast that meeting it will require an extra 300 million tons of grain a year by 2050.
A United Nations report says reaching that goal will require major increases in intensive, high-efficiency livestock operations for both meat and dairy production.
The fact that lake levels in the semiarid southwestern United States appear to have been higher during the last ice age than they are now was at one time attributed to increased precipitation.
Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase.