Kazakh President Kassym-Jomart Tokayev addresses the Regional Ecological Summit in Astana, Kazakhstan on April 22, 2026. The Regional Ecological Summit was held in Astana from Wednesday to Friday. (Kazakhstan's presidential press service/Handout via Xinhua)

This photo taken on April 22, 2026 shows a scene during the Regional Ecological Summit in Astana, Kazakhstan. The Regional Ecological Summit was held in Astana from Wednesday to Friday. (Kazakhstan's presidential press service/Handout via Xinhua)

This photo taken on April 22, 2026 shows a scene during the Regional Ecological Summit in Astana, Kazakhstan. The Regional Ecological Summit was held in Astana from Wednesday to Friday. (Kazakhstan's presidential press service/Handout via Xinhua)

Participants are pictured in the venue for the Regional Ecological Summit in Astana, Kazakhstan, April 23, 2026. The Regional Ecological Summit was held in Astana from Wednesday to Friday. (Photo by Kalizhan Ospanov/Xinhua)