Sentences with phrase «why methane in the atmosphere»

Not exact matches

The methane piece of the global warming puzzle is even more difficult to grasp because while its levels have steadily risen since the mid-19th century, they have leveled off in the past decade, and scientists aren't sure why — there could be less methane emissions or more destruction of the molecule as it reacts in the atmosphere.

But Field has also not explained why he signed a petition stating * that there was «no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the earth's atmosphere and disruption of the earth's climate.»

Scientists have been trying to discover why methane levels in the atmosphere started rising in 2007 after holding steady for nearly a decade.

The methane piece of the global warming puzzle is even more difficult to grasp because while its levels have steadily risen since the mid-19th century, they have leveled off in the past decade, and scientists aren't sure why — there could be less methane emissions or more destruction of the molecule as it reacts in the atmosphere.