Microbes, not fossil fuels, produced most new methane: study Subject: Environment Section: Climate change Tag: Greenhouse gases, Methane, Global methane Pledge Context: Historically, methane levels rose until the 1990s, stabilized, and then began increasing again in 2007. Current methane concentrations are estimated to be three times higher than they were 300 years ago. […]

    Greenhouse Gases Subject – Environment Context – Phasing out Methane discussed during COP26. Concept – Gas Lifespan Warming Potential Carbon dioxide 150-200 years 1 Methane 12-15 years 28 times CO2 Nitrous Oxide 120 years 265 times CO2 Fluorinated gases 3.2-10,000 years 151-23,900 times CO2