Sleep deprivation, hope, concern - final hours of COP26

Banging the drum for ambitious action - a call to put a stop to climate catastrophe.

World leaders are working around the clock to strike a deal as the COP26 climate-change summit enters its final stages on Friday.

Negotiators in Glasgow are hammering out an agreement to limit global temperature rises by dramatically reducing emissions.

But it will need unanimous consent from the nearly 200 nations attending.

And, as Cassie Flynn, a U.N. Strategic Advisor in Climate Change explains, traditionally, these summits never end on time.

"Well, these COPs are a long haul. They are two weeks, often they can be three weeks for many delegations who have some of these pre-conversations. And when we reach this point in the COP, you essentially have room after room of negotiators sitting around tables, looking at documents on screen and going line by line, word for word. And this is really tough stuff. They often go through the night, trying to come to areas of compromise in these texts."

In the latest draft text of the agreement, language around the phasing out of fossil fuels has been diluted - in a bid to get a deal done.

And it fails to offer the rolling annual review of climate pledges that some developing countries have pushed for - but Washington in particular opposed.

It also lacks detail on future payments from the rich countries that are primarily responsible for global warming to the poorer countries that will take the brunt of worsening storms, droughts, floods and rising sea levels.

Some attendees feel feel despondent.

"We don't have any more time. We need to be faster. [FLASH] And making sure that we are not getting to a point that there is no turning back, and we are there with the commitments that are already there we are not going to meet the 1.5 that we are trying to keep alive in this COP. So we should be more forward and aggressive and if they are weakening the language that is disappointing."

But others believe it's the only way forward.

"I think what people are doing here is pretty earnest, I think they are trying and I think the idea is to get something that will be agreed to by everybody"

Even when they do come to an agreement, the real work will begin once delegates return home - when they'll need to ensure any measures signed off in Glasgow are upheld.

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