While speaking in Paris at a news conference alongside French President Emmanuel Macron on Saturday, Modi said the agreement was part of "our duty to protect Mother Earth".
The assertion by the two leaders came a day after USA president Donald Trump announced his decision to pull out of the Paris Accord, blaming among other things, India seeking huge aid to fight climate change. India, the world's fourth-largest emitter of greenhouse gases, is a critical player in the climate pact.
In a slide by slide repudiation of the Trump administration's claim that "the Paris Accord is a bad deal for America", the edited French version of the White House video read, "Leaving the Paris Accord is a bad deal for America and the world", the CNN reported.
"The Paris agreement is the common heritage of the world". It will benefit the future generations as well as us.
While neither leader mentioned Trump by name, both stressed their commitment to the Paris accord which the USA president vilified Thursday as being harmful to the American economy.
Mr Modi said, Paris accord on climate change is an article of faith for India. "Terrorism is one of the biggest challenges the world is facing today", Modi said, adding that he and Macron discussed extensively on how to save the world from terrorism and radicalisation. Innocent people, women, children lose their lives to terror.
He said France wants more Indian students to come to France for education and similarly French students going to India. "World needs to unite to defeat the menace of terrorism", Modi said.
Macron on Thursday invited U.S. scientists, business people and citizens frustrated with the White House's stance to move to France, assuring them of "a second homeland" across the Atlantic.
France and India have launched the Global Solar Alliance aimed at developing solar energy and making it accessible to all.
Prior to the visit Modi had already hailed Macron's victory over the far-right as an opportunity to reinforce ties between the two countries nearly 20 years after agreeing in 1998 a strategic partnership.
"Lest we forget. PM @narendramodi and President @EmmanuelMacron jointly lay wreath at Arc de Triomphe in memory of Indians who died for France", Ministry of External Affairs Spokesperson Gopal Baglay tweeted.
This story has been corrected to show the firm name of India's prime minister is Narendra, not Nahendra.
Macron also said he would travel to India before year's end for a summit on promoting solar energy.
Arriving at the presidential palace the 66-year-old Indian nationalist hugged 39-year-old Macron, in scenes contrasting with Macron's clenched-jawed, white-knuckle handshake with Trump in Brussels last week.
"Terrorism is visible and affects the entire world, including France and India".