On November 30, world leaders will convene in Paris to form a consensus on how to address climate change. The United Nation’s COP21/CPM11 conference is intended to produce international agreements and solutions for how best to achieve climate goals and keep global warming below 2°C—the ceiling set by climate scientists to prevent dangerous and catastrophic changes around the globe.

Some climate scientists are concerned that not enough will be done though—and that it may soon be too late. Ahead of the conference, countries submitted plans detailing how they will cut back on emissions and collectively, scientists say, they may fall short.

Today in an in an Op-Ed, Secretary of State John Kerry highlighted the ambitious goals set by the Obama Administration in accordance with the conference—including curbing the 2005-level greenhouse gas emissions by up to 28 percent over the next 10 years—but also warned that the climate talks aren’t guaranteed to be a success. “I have seen the world try and fail to address this threat for decades,” he writes. “We have been doing all we can to avoid the pitfalls of the past.”

Christiana Figueres, the head of the UN Climate Change Secretariat, is confidant that they will get an agreement—and that it will have a big impact—but emphasized that everyone has to play a role.

Do you have a question for me about #COP21 or #climateaction? Ask me next Wednesday at my @Reddit_AMA. #AMA! pic.twitter.com/fD0v0I85l4 — Christiana Figueres (@CFigueres) October 26, 2015

In an Ask Me Anything session on Reddit, Figueres cited the momentum and progress that has been building over the past five years and stated that, while the 2°C goal is a difficult one, global collaboration will help make it achievable.

If last night’s GOP presidential debate is any indication, public opinion is starting to influence political action in the United States. In September, the majority of republican voters polled said they agreed with scientists that people responsible for global warming.

Republican candidates have historically denied climate science but last night, two candidates in the junior debate (held for candidates polling near zero) admonished their own party for its inaction and declared the need for new measures to combat climate change.

“One of the things that troubles me about the Republican party is too often we question science that everyone accepts,” Former New York Governor, George Pataki said. “It’s also not appropriate to think that human activity, putting CO2 into the atmosphere, doesn’t make the earth warmer, all things being equal—it does. It is uncontroverted.”

Senator Lindsey Graham (R-SC) also came out strongly in support of climate change, citing the overwhelming majority of scientists who are sounding the alarm. When a moderator suggested that he might be running in the wrong party he responded by saying he was “trying to solve problems that somebody better solve.”

Still, climate change was largely absent from the debate held with Republican front runners—and many of them still aren’t convinced.

It's really cold outside, they are calling it a major freeze, weeks ahead of normal. Man, we could use a big fat dose of global warming! — Donald J. Trump (@realDonaldTrump) October 19, 2015

Figueres, however, says that she is far from giving up—even when faced with such setbacks.