In Am Inconvenient Truth the main greenhouse gas is

What

The main greenhouse gas discussed in "An Inconvenient Truth" is carbon dioxide (CO2).

In the documentary "An Inconvenient Truth," the main greenhouse gas highlighted is carbon dioxide (CO2).

To find the answer to your question, we can do a quick research on the internet. "An Inconvenient Truth" is a documentary film presented by former US Vice President Al Gore which focuses on climate change. In the film, the main greenhouse gas that is highlighted is carbon dioxide (CO2). Carbon dioxide is known to be the primary greenhouse gas responsible for trapping heat in the Earth's atmosphere and contributing to global warming. It is mainly released through human activities such as burning fossil fuels, deforestation, and industrial processes.