The final factor moving us closer to war with Iran is the fact that we are already fighting a proxy war with Iran inside Iraq. The most under-appreciated passage from General Petraeus's congressional testimony was his description of the role of Iran:
In the past six months we have also targeted Shia militia extremists, capturing a number of senior leaders and fighters, as well as the deputy commander of Lebanese Hezbollah Department 2800, the organization created to support the training, arming, funding, and, in some cases, direction of the militia extremists by the Iranian Republican Guard Corps' Qods Force. These elements have assassinated and kidnapped Iraqi governmental leaders, killed and wounded our soldiers with advanced explosive devices provided by Iran, and indiscriminately rocketed civilians in the International Zone and elsewhere. It is increasingly apparent to both Coalition and Iraqi leaders that Iran, through the use of the Qods Force, seeks to turn the Iraqi Special Groups into a Hezbollah-like force to serve its interests and fight a proxy war against the Iraqi state and coalition forces in Iraq.
To pursue this proxy war, the US is arresting Iranian operatives and building outposts on the Iranian border for the purpose of interdicting weapons smuggled to Iran's agents in Iraq.
This doesn't exactly pertain to the current environment, but it begs to question what would happen, at an environmental level, to the area if it was burdened with another war?