Editing Civilization: Call to Power (section)

===Pollution===
In ''Call to Power'', pollution is produced in meaningful quantities after the Industrial Revolution advance. Cities that produce a lot of pollution will start to produce "dead tiles" within their city radius. Such tiles produce no resources. If pollution is left unchecked, eventually the game will give a warning that global disasters will occur. Disasters include change in climate, [[ozone]] deterioration, and [[global warming]]. In the case of global warming, the game informs the player that "ice caps have melted" and sea levels have risen. Tiles affected are turned into either coast or shallow water, and cities on tiles that become shallow water or coast are destroyed.

The destruction of the [[ozone layer]] causes a large number of land tiles to become dead tiles. If a nation is appropriately technologically advanced, then that nation can repair dead tiles, but only at a significant cost of industrial production. The "Gaia Controller" wonder removes all pollution in the game but can be built only in the Diamond Age.

Pollution is exacerbated by several city facilities such as [[Factory|factories]] and [[Oil refinery|oil refineries]]. On the flip side, some facilities such as recycling plants and [[nuclear reactor]]s will reduce the production of pollution. Additionally, certain events such as space launches and use of [[nuclear weapon]]s will result in one-time additions of pollution each time that they occur.

An initial setup feature is game play without pollution problems.