Sentences with phrase «main greenhouse gas emitted by human activities»

The value at the end of Barack Obama's presidency was set at roughly $ 40 for each ton of carbon dioxide, the main greenhouse gas emitted by human activities, or equivalent amounts of other gases such as methane.

The scientists find much merit in pursuing further research on both, but only see practical prospects for capturing and storing carbon dioxide, the main greenhouse gas emitted by human activities.

She asked him to explain his dissent in the 2007 case in which the Supreme Court ruled that the Environmental Protection Agency had the authority to regulate carbon dioxide, the main greenhouse gas emitted by human activities, as a pollutant under the Clean Air Act.