World leaders will convene at a climate summit hosted by UN Secretary-General Antonio Guterres on Wednesday in New York. Countries face mounting pressure to set more ambitious emission reduction targets for 2035 ahead of COP30 in Brazil. Governments were invited to submit their updated pledges by February 2025. Of the 195 Paris Agreement signatories, only 13 countries have met the deadline, while a total of 37 have submitted new plans. FRANCE 24’s Valérie Dekimpe explains.