Which of the following statements are correct about the deposits of 'methane hydrate'? 1. Global warming might trigger the release of methane gas from these deposits. 2. Large deposits of 'methane hydrate' are found in Arctic Tundra and under the seafloor. 3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two. Select the correct answer using the code given below.

1. Statement 1 is correct. Methane hydrates are ice-like structures containing methane trapped within water molecules, stable under high pressure and low temperature. Global warming, leading to increased ocean temperatures and melting permafrost, can destabilize these deposits, potentially triggering the release of large amounts of methane gas, a potent greenhouse gas, creating a positive feedback loop. 2. Statement 2 is correct. Significant quantities of 'methane hydrate' are known to exist in sediments under the seafloor along continental margins and within permafrost regions, particularly in the Arctic Tundra. 3. Statement 3 is correct. Methane (CH4) in the atmosphere has an average lifetime of about 12 years. It is primarily removed through chemical reactions, mainly by oxidizing (reacting with hydroxyl radicals, OH) to form carbon dioxide (CO2) and water (H2O). This process occurs over a timescale of roughly a decade or two. 4. Therefore, all three statements are correct.