Earth

Three hundred years of ignorance and disregard for their actions has left the homeworld of the Human species a rotting husk of her former self. Terra lost her water almost a hundred and fifty years ago (2430 CE) and her major resources much further than that. It is currently believed that, even with the best minds in the TCR working on a revival effort of the lost world, it will not be suitable for large colonization efforts for more than five thousand years. Already, a new generation of humans has begun to grow without ever having the chance of truly seeing the gem of their kind that is represented by five hundred year old photographs, stories, and myths.

Today, Earth is a dry ball of toxic air with an average temperature far above the former mean temperatures of previous centuries. While it was predicted that a rise of mean temperature by three degrees could be devastating, humanity found out the hard way when Earth's mean rose, not by three degrees Celsius, but by sixteen. That is, on average, a raise of over 60°F to a regional temperature. Water evaporated, flora and fauna died off, and resources disappeared. Now, its only inhabitants are four permanent colonies in what was formerly New York City, Wenquan (China), Feldberg (Germany) and London. These four are used for different purposes all year round:
 * New York Colony is the capital of the Terran Colonial Republics, currently housing more than twelve thousand colonists in underground facilities. It has a direct link to TRS in orbit from which it receives supplies biweekly.
 * Wenquan acts as the highest point of colonization on Earth. It is currently the lowest population center, holding only a small science team dedicated to revitalizing the atmosphere.
 * Feldberg acts as a military installation on Earth. Typically used for advanced Special Forces training for hostile environments, it is permanently inhabited by only a few thousand Marines.
 * London, the second smallest population center, is currently being built as the newest colony on Earth.