Now to the COP28 climate conference and efforts to address global warming. Abc's Lama Hassan has more from London. Lama, good morning.

Yang, good morning to you. A major announcement this morning, the presidents of COP28 declaring a new deal that aims to dramatically reduce methane emissions over the next five years, with over 50 oil companies taking part, vowing to cut emissions by 80% to 90% within the next five years. Now, this is a big deal, not least because methane is a greenhouse gas, and the main ingredient in natural gas. It is potent and has been described as global warming's blowtorch blame for nearly 30% of the earth's warming. Now, because it only lasts about a decade in the atmosphere, stopping it now will have a swift impact on global warming. Us and Chinese officials are already committing to host a methane summit during the conference, but so far, China refuses to join the Global methane pledge, choosing to track and reduce emissions instead. The timing of this announcement is particularly poignant. The UN declaring this year to be the warmest on record, with global temperatures rising 1.5 degrees Celsius above pre-industrial levels. The agreement is expected to have minimal impact on consumers, but experts say that even a small decrease in global methane emissions can have a big impact on Earth's global temperature trajectory, GEO.

Truly big.

News out of that. All right, Lama, thank you.

So much. Hi, everyone. George Stephanopoulos here. Thanks for checking out the ABC News YouTube channel. If you'd like to get to watch more videos, show highlights, and watch live event coverage, click on the right over here to subscribe to our channel. Don't forget to download the ABC News app for breaking news alerts. Thanks for watching.