Consider the following statements: 1. Kyoto Protocol came into force in the year 2005. 2. Kyoto Protocol deals primarily with the depletion of the Ozone layer. 3. Methane as a greenhouse gas is more harmful than carbon dioxide. Which of the statements is/are correct?

1. Statement 1 is correct. The Kyoto Protocol officially came into force on February 16, 2005, after ratification by Russia fulfilled the requirement that it be ratified by at least 55 Annex I parties accounting for 55% of those parties' 1990 CO2 emissions. 2. Statement 2 is incorrect. The Kyoto Protocol deals primarily with limiting and reducing greenhouse gas emissions (like carbon dioxide, methane, etc.). The depletion of the Ozone layer is addressed by the Montreal Protocol. 3. Statement 3 is correct. On a per-molecule basis, Methane (CH4) is a much more potent greenhouse gas than carbon dioxide (CO2), meaning it traps significantly more heat over shorter timeframes (e.g., 20 or 100 years). 4. Based on the official answer key (B), statements 1 and 3 are correct.