NEW DELHI: The International Solar Alliance (ISA) will play a key role in raising 1,200 billion euros ($1,300 billion) by 2030, to meet the solar energy targets set at the climate conference in Paris, French President Francois Hollande said. Holland was speaking at a function to inaugurate the interim secretariat of the alliance in Gurgaon, where he and Prime Minister Narendra Modi travelled in the Delhi Metro. “We could have come by car or helicopter too, but we wanted to underline that use of public transport is also a means of reducing global warming,” Modi said. The headquarters will be located on a five-acre plot on the premises of the National Institute of Solar Energy (NISE) in Gurgaon. The ISA, an organisation of 121 countries lying between the Tropic of Cancer and Tropic of Capricorn, all of which get more than 300 days of annual sunshine, was floated by India and France at the COP21meeting in Paris.