Methane Combustion

I just saw a commercial for a gas company promoting natural gas as a clean energy source. Not posting a video link, but, really? Natural gas?

Let's take the example of methane (the most common natural gas):

CH4 + 2 O2 → CO2 + 2 H2O

This is the simplified balanced equation for the combustion of methane, skipping all the intermediary steps. What's this CO2 business on the right? Oh, Carbon Dioxide. And water! Both of which are considered greenhouse gases (the latter in vaporized form).

Oups, gas company.

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