Is natural gas a sustainable resource?

Geologic natural gas is a fossil fuel, and as such, has a limited supply. However, renewable natural gas is derived from recurring sources, such as landfills and animal waste, and therefore can be replenished. The overall potential supply of technically recoverable geologic natural gas declines with every new well drilled, but the potential reserves of RNG still has the ability to increase. According to the Coalition for Renewable Natural Gas (RNG Coalition), as of December 2021, there were 355 RNG projects in operation or under construction in the U.S. & Canada, a mere fraction of the more than 43,000 locations that aggregate organic waste in those two countries. Certainly not all of those are potentially economic for producing RNG, but the RNG Coalition does expect global RNG production to grow 27x from 2020 to 2050.