1. State law requires the state to reduce greenhouse gas emissions 40 percent from 1990 levels by 2030.

2. Obama has said his decision will turn on whether the pipeline increases greenhouse gas emissions.

3. The motivation for us was climate change and reducing our greenhouse gas emissions.

4. So we could export our greenhouse gases, Musk said as the audience laughed.

5. Less congestion could lead to less pollution and greenhouse gas emissions.

6. Where does curbing greenhouse gas emissions fit into that, and what can Chevron do to help?

7. If it gets thick enough, you will get that greenhouse effect, Warner said.

8. Nearly every nation that signed the 2015 agreement has agreed to curb greenhouse gas emissions.