是什么让这一国宣布迁都？

Group 1 - The Brazilian government has decided to temporarily move the capital from Brasília to Belém from November 11 to 21 to host the COP30 conference [1] - COP30 is the 30th Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC), aimed at stabilizing greenhouse gas concentrations in the atmosphere [1] - The focus of COP30 will be on transforming commitments into actionable steps, emphasizing collaboration among nations for a prosperous, safe, and resilient future [1] Group 2 - The World Resources Institute (WRI) states that COP30 could drive significant change if substantial outcomes are achieved, building on the commitments made at COP29 [2] - COP29 established a goal for developed countries to provide at least $300 billion annually by 2035 to support developing nations in addressing climate change, with a long-term target of $1.3 trillion per year [2] - The "Baku to Belém Roadmap" is a joint plan to achieve the $1.3 trillion goal, requiring countries to establish national platforms for coordinating diverse climate funding [2] Group 3 - There is an expectation for countries to set more ambitious emission reduction targets aligned with their net-zero goals during the conference [3] - Key sectors such as energy, agriculture, and transportation are anticipated to undergo systematic transformations [3] - The conference aims to send a positive political signal supporting the UNFCCC and the Paris Agreement, emphasizing the irreversible trend towards global green and low-carbon transformation [3]