By Kate Abnett

BRUSSELS (Reuters) -The United Nations urged countries on Wednesday to set more ambitious climate plans during this month, seeking to pressure major economies including the EU and China ahead of this year’s U.N. climate summit.

The U.N. had asked countries to submit their plans, called Nationally Determined Contributions, or NDCs, within September so that their efforts can be assessed before the COP30 summit in November in Brazil.

Most countries have yet to do so despite agreeing to submit them this year under the 2015 Paris Agreement. The updated NDCs should describe how each country plans to cut emissions by 2035.

In a letter to nearly 200 countries, U.N. climate chief Simon Stiell described the NDCs as “the cornerstone of humanity’s fight against the global climate cr

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