BEIJING: China is offering no significant new goals for reducing climate-changing emissions ahead of the UN climate summit set to start today, October 31, in Glasgow.

China, the world's top emitter of carbon dioxide and other greenhouse gasses that cause global warming, formally submitted its goals on Thursday.

The highly-anticipated announcement gathered targets previously established in speeches by President Xi Jinping and domestic policy documents.

China says it aims to reach peak emissions of carbon dioxide — which is produced mainly through burning coal, oil and natural gas for transportation, electric power and manufacturing — "before 2030." The country is aiming for "carbon neutrality" — no net emissions of CO2 — before 2060.

"It's not surprising, but it is disappointing that there wasn't anything new" in terms of goals, said Joanna Lewis, an expert in China, climate and energy at Georgetown University.

Lewis said the document released Thursday "gave more detail about how China will meet those goals," however, by measures including increasing its wind and solar power capacity, as well as carbon-absorbing forest cover.

Climate experts say key questions about China's future carbon emissions remain unanswered.

"The document gives no answers on the major open questions about the country's emissions," said Lauri Myllyvirta, lead analyst at the Centre for Research on Energy and Clean Air in Helsinki. "At what level will emissions peak and how fast should they fall after the peak?"

Nations participating in the UN climate conference, known as the 26th Conference of Parties, or COP26, submit what are called "nationally determined contributions" that lay out emissions reduction plans.

It's still possible that China may have additional announcements at the climate summit related to financing for renewable energy overseas, said Lewis.