According to the Energy Information Agency, Russia's proven reserves of natural gas total more than 1.8 quadrillion cubic feet. That's quadrillion.
For the more mathematically inclined, we're talking: 1,800,000,000,000,000 cubic feet. So how big is a quadrillion anyway? Apparently, one quadrillion seconds equals 31,709,792 years.
That's a lot of gas.