"We reiterate our commitment to sustainable development, strong and effective support and actions to address climate change. We commit to complete our respective domestic procedures in order to join the Paris Agreement as soon as our national procedures allow," said the joint communique issued at the end of the G20 summit.
India came under pressure to ratify the deal after China and the US - responsible for around 40 per cent of the world's carbon emissions - ratified the agreement ahead of the G20 summit and handed over their countries' instruments of joining the agreement to UN Secretary-General Ban Ki-moon on Saturday.
The Paris Agreement has charted the course for post-2020 global cooperation against climate change, and it indicates that a cooperative, win-win, equitable and fair climate governance mechanism is being shaped.
"We welcome those G20 members who joined the Agreement and efforts to enable the Paris Agreement to enter into force by the end of 2016 and look forward to its timely implementation with all its aspects," the joint statement said.
"We reaffirm the importance of the support provided by the Green Climate Fund. We welcome the G20 Climate Finance Study Group Report on promoting efficient and transparent provision and mobilisation of climate finance to enhance ambition of mitigation and adaptation actions."
"We look forward to successful outcomes in related multilateral fora, including the Montreal Protocol and the International Civil Organisation," it said.