Climate change might be behind powerful explosions in Siberia

The video discusses a powerful explosion in Russia that created a large crater. It was the 17th such crater discovered since 2013. Scientists used drones to create a 3D model, confirming that methane gas buildup in ice cavities causes these explosions. The source of the methane remains uncertain, possibly originating from deep within the Earth or near the surface. As Siberia's permafrost melts due to warming, methane blowouts are expected to become more frequent.

What are the possible sources of methane mentioned in the text?

How is climate change related to the frequency of methane blowouts?