Sir — This refers to the editorial, “Climate vow honoured” (September 27). The Prime Minister’s decision to ratify the Paris agreement on Mahatma Gandhi’s birth anniversary, to ensure the treaty’s entry into force this year, will buttress India’s claim as a climate leader. It cements the idea of India as a country that surmounts its own development challenges for global collaboration on humanity’s common challenges. After ratifying the Paris deal, India must ensure that the developed bloc makes generous commitments on climate finance.