Prime Minister Narendra Modi held a bilateral meeting with United Nations Secretary General Antonio Guterres at Kevadia in Gujarat.
Officials said Modi had a long interaction with Guterres, who is on a three-day visit to India since Wednesday.
PM Modi and the UN chief will later launch Mission LiFE (Lifestyle for Environment), which aims at a three-pronged strategy for changing people's collective approach towards sustainability.
Guterres will also visit Modhera, which was recently declared as the country's first 24x7 solar-powered village, and interact with women from the village.
Modhera, located in Gujarat's Mehsana district, also has one of the oldest sun temple.
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