The award, bestowed for the first time by Seychelles, recognises Modi's contributions to advancing the interests of developing countries and his longstanding commitment to sustainable management of ocean resources, climate resilience and the developmental aspirations of Small Island Developing States (SIDS).
Accepting the honour at a special ceremony, Modi dedicated the award to all countries committed to environmental conservation and the fight against climate change.
He said the recognition, conferred as India and Seychelles celebrate 50 years of diplomatic relations, would further strengthen the longstanding friendship between the two nations.
According to the Prime Minister's Office, the honour also acknowledges Modi's global environmental initiatives, including the International Solar Alliance, Mission LiFE (Lifestyle for Environment), Ek Ped Maa Ke Naam, and the International Big Cat Alliance.
It adds to a series of international recognitions received by Modi for promoting sustainable development, including the Agricola Medal of the UN Food and Agriculture Organization (FAO), the Seoul Peace Prize and the UN's Champions of the Earth Award.
Accordinf to a statement, the honour reflects Seychelles' recognition of India's growing role as a trusted partner in capacity building, environmental action, sustainable development and advancing shared priorities across the Indian Ocean region.
Modi arrived in Seychelles on a three-day State visit from June 27 to 29 at the invitation of President Herminie to attend the country's Golden Jubilee National Day celebrations as the Guest of Honour.
Ahead of the visit, Modi had described Seychelles as "a valued maritime neighbour and a key partner" in India's Vision MAHASAGAR and said the visit would deepen bilateral ties, strengthen maritime cooperation and promote security and prosperity in the Indian Ocean region.
He is also set to become the first Indian Prime Minister to address the National Assembly of Seychelles during the visit.