2016 · Q124
The largest greenhouse gas leakage in the US history took place in February 2016. The gas was:
current-eventsenvironment-news
- ACarbon dioxide
- BMethane
- CChlorofluorocarbon
- DNitrous oxide
Explanation
The Aliso Canyon gas leak near Los Angeles (detected October 2015, sealed February 2016), the largest greenhouse-gas leak in US history, released methane from an underground storage facility. It was not carbon dioxide, CFCs, or nitrous oxide. Hence methane is correct.