They aim to establish rules, figure out financing and build ways to verify that nations are meeting their commitments.
According to SBS, the Katowice conference is the most important United Nations event since the Paris Accord in 2015 - the conditions of which were created to prevent further climate disaster, and which we're on track to drastically overshoot.
"The continuation of our civilisations and the natural world upon which we depend, is in your hands", he said. Speaking from the 'People's Seat, ' he admonished the almost 200 nation delegates present saying: "The world's people have spoken".
Michal Kurtyka, Poland's deputy environment minister and president of the talks, said that without success in Katowice, Paris would not be a success, as it had only decided what was needed, not how it could be done.
"We are approaching unsafe climate thresholds, species are disappearing at an unseen rate, lands are degrading at an accelerated pace and global carbon dioxide emissions increased in 2017 after a three-year period of stabilization".
Scientists say the only way to keep average global temperatures from rising above 1.5 degrees Celsius (2.7 F) by the end of the century is to phase out the use of fossil fuels by 2050.
The 24th Conference of the Parties, known as COP24, is taking place near a Katowice coal mine used for 176 years and closed in 1999.
"In short, we need a complete transformation of our global energy economy, as well as how we manage land and forest resources", said Guterres.
Guterres called for a "huge increase in ambitions" during the negotiations in Poland, adding "we can not afford to fail in Katowice".
But host Poland - heavily reliant on energy from coal - will push its own agenda: a "just transition" from fossil fuels that critics say could allow it to continue polluting for decades.
Modi and Guterres met last week on the sidelines of the G-20 Summit in Buenos Aires, Argentina, where the two held discussions about climate change and India's support for the Paris Climate Agreement. "They want you, the decision-makers, to act now", Attenborough said.
Attenborough, known worldwide for his uniquely passionate nature documentary narrations, was invited to the COP24 United Nations climate conference in the city of Katowice as a representative of the people of the world, many of who sent in messages that Attenborough reportedly used to inform his speech.
Guterres is in the Polish city Katowice for the high-level UN COP24 Climate Change Conference.
The report offers the latest accounting of national mitigation efforts and the ambitions countries have presented in their Nationally Determined Contributions, which form the foundation of the Paris Agreement.
President Donald Trump has threatened to pull the US out of the Paris agreement because of what he says is the economic damage the treaty's provisions would cause.
But many other countries are already dealing with the droughts, higher seas and catastrophic storms climate change is exacerbating right now.