Explanation:

 The United Nations invited Uttar Pradesh's, Noida and Greater Noida to become a member of its initiative which aims to create 25 model cities across the world that will be fully compliant with the sustainable development goals by 2025.

• The twin-cities in Gautam Buddh Nagar district, adjoining the national capital, have been selected in the "University City" category ahead of Mumbai and Bengaluru, which were also under UN consideration for the initiative as the only invitee from India.
• Overall 25 cities across the world have been selected in five categories by the UN Global Sustainable Development Goals cities initiative
• In the “University City” category, Noida-Greater Noida will be competing with elite university cities such as Cambridge, Palo Alto and Heidelberg.
• Schatz highlighted that the SDG cities initiative will lead to an "unprecedented inflow" of global knowledge, resources and capacity building into Noida and Greater Noida via various UN agencies, partners and corporate supporters.