I'd love to see a solid reference with that proclamation.
Oh, and while Methane might still technically a trace gas (by% of gasses in the atmosphere), its presence has trebled over the last 200 years. It is also somewhere bettween 20-80 times more potent as a heat trap than CO2 and at is least a 20% contributor to atmospheric warming right now.
References avaiable on request but after you.