Which of the following is false concerning methane emissions? 1. As permafrost thaws in the arctic, methane may be released, leading to further warming. 2. Methane clathrates are a secure methane sink and are not expected to release methane, even with extreme climate change. 3. Methane emissions can be determined to be from "old" carbon (i.e. fossil fuels) or "new" carbon by analyzing C-14 content. 4. Anthropogenic methane emissions could be decreased be decreasing the amount of livestock. 5. Methane, while a more potent greenhouse gas, has a shorter lifetime in the atmosphere than CO2.

1. As permafrost thaws in the arctic, methane may be released, leading to further warming.

2. Methane clathrates are a secure methane sink and are not expected to release methane, even with extreme climate change.

3. Methane emissions can be determined to be from "old" carbon (i.e. fossil fuels) or "new" carbon by analyzing C-14 content.

4. Anthropogenic methane emissions could be decreased be decreasing the amount of livestock.

5. Methane, while a more potent greenhouse gas, has a shorter lifetime in the atmosphere than CO₂.