According to scientists, such a reduction is necessary to keep global warming below 2 degrees Celsius and prevent the increasingly serious consequences of climate change, the alliance said.

Since May, the alliance has been expanded to include 52 members, including the cities of Manchester, New York, San Francisco and Mexico City, the regions of Lombardy, Catalonia and Wales, and the countries of Holland, Italy and the UK.

Accordingly, the alliance affects the residential areas of 520 million people.

Joining the initiative does not entail financial obligations for Budapest, which will be the first member from central and eastern Europe. The general assembly meeting passed the proposal unanimously.

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