what does methane cause
Methane is much more complicated once it gets into the atmosphere than something like carbon dioxide is, Shindell says, and that's because it reacts with a lot of different important chemicals.. Bad For Climate And Health. For example, methane in the atmosphere also creates ground-level ozone.And ozone isn't only bad for human health; it also contributes to global warming. Shindell recently totaled up all the effects of methane emissions and realized that the heating effect is more than 60 percent that of carbon dioxide's.lobal warming is causing these wetlands to produce more methane. And the methane is causing more global warming. Paul Palmer, University of Edinburgh. This really does demonstrate the fact that we are having this vicious cycle in the climate system.