AP Photo/Christophe Ena

An activist protesting against polluters holds a banners at the Climate Generations Areas, part of the COP21, the United Nations Climate Change Conference Wednesday, Dec. 2, in Le Bourget, north of Paris.

LE BOURGET, France (AP) — With world leaders back home, it’s time for the hardcore negotiators to work on the more mundane guts of a climate deal, and they are being told to quicken their pace.

Generally climate negotiations follow a certain rhythm, veteran negotiators and observers say. Wednesday is the middle of the nitty-gritty time when the building blocks of a deal start to form. And small things like punctuation can make or break a deal.

“It’s like seeing an action movie,” said former U.S. climate negotiator Nigel Purvis, who is now president of Climate Advisers. “There’s generally a plot, bad guys come to threaten the world. Eventually humanity rallies together and overcomes. That’s the kind of thing that happens here.”

For the next few days negotiators will be working to get the less-controversial subjects finished and explore possible compromises on the bigger sticking-points, all before work gets kicked up to higher levels. The lower-level negotiators have a Dec. 5noon deadline to come up with language for a new text of a deal that narrows the options to something the big guns start with, according to French Foreign Minister Laurent Fabius, who is the president of the climate talks.

“We must speed the process up because we have much work to do,” Fabius said at a Wednesday news conference. “Compromise solutions must be found as soon as possible.”

A record number of world leaders gathering in one place to discuss the single issue of climate change sends a strong signal, United Nations climate chief Christiana Figueres said. Fabius called it “strong momentum,” a phrase echoed later Wednesday, De. 2, by chief U.S. negotiator Todd Stern.

U.S. Secretary of State John Kerry was even more effusive at a news conference of NATO foreign ministers.

“I don’t think I can ever remember a time when more than 150 leaders of nations, heads of state have come together in one place for the purpose of furthering an issue of concern to all of them,” Kerry said, adding that climate talks “represent one of the great security challenges of the world, as well as environmental challenges, as well as energy challenges, as well as health challenges, as well as moral obligations. And these talks, I thought, got off to an encouraging start.”

The Nov. 30 announcement Monday from Bill Gates, other private business leaders and 20 different countries about a multibillion-dollar research-and-development program for clean energy will go down as on the most important deals struck in Paris, Stern said.

The key is for many issues to be settled by Saturday, Fabius said, who repeatedly mentioned the need to speed up negotiations.

Different negotiators signaled areas where sides may get together. Early Wednesday, an Indian delegate said that India would reduce dirty coal power use if other countries gave financial aid for cleaner renewable power. Then Stern responded, saying: “We certainly want to work our Indian partners to encourage what they want to do and will do our best to realize that.”

Jennifer Morgan, global climate program director for World Resources Institute, said the thousands of lower-level negotiators are in smaller groups where they have to narrow options on each issue from, say, six to two for the higher-level officials to peruse. Negotiators talk formally and informally, including on the bus rides back to the hotel.

“It’s pretty clear that if this level doesn’t deliver something that’s much more streamlined, it just makes it much more hard for the ministers to negotiate,” Morgan said.

The language negotiators are now using is “wonky and acronym-laden” Meyer said. “But it’s important; without it you couldn’t get the ingredient.”

While it is tense, Morgan said it’s not time for yelling — yet. That comes later in the higher negotiations, Purvis said.

“It does get worse before it gets better,” Purvis said. He said experienced negotiators know there will be some kind of “crisis” where all appears lost, and then a solution is found.

“It may seem like there’s a breakdown on the outside of the negotiations, but there’s usually a lot of patience and perseverance on the inside,” Purvis said.

Out in public, there may be theatrics, but at times it is just for show, Purvis said. Other times an impasse can be solved in an unusual way. Purvis gave an example in 2008 of an issue that was solved by the insertion of a single comma — “a magic comma” — in the language of the deal.

“Once this magic comma was inserted, then peace ruled and we were able to move forward,” Purvis said.

At Wednesday’s press conference, Figueres referred to the importance of punctuation.

Negotiations “will go through ups and downs,” she said. “There will be many commas inserted and many commas removed because that is the nature of this.”