Heat within 10,000 meters of the earth's crust contains 50,000 times more energy than all the oil and natural gas resources in the world. (reuters.com)
These kinds of leaks from production and transportation of natural gas resources have been well documented. (scientificamerican.com)
Natural gas resource estimates keep increasing as technology unlocks resources previously considered too difficult or costly to produce. (instituteforenergyresearch.org)