What factor causes the actual methane emissions from the energy sector to often exceed the amounts officially reported by nations?

Answer

Accounting for fugitive emissions and venting.

The energy sector's reported figures frequently omit methane released unintentionally through leaks (fugitive emissions) and intentional releases (venting) across the oil, gas, and coal supply chains.

What factor causes the actual methane emissions from the energy sector to often exceed the amounts officially reported by nations?
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