PHOTO / WORLD
"Ecology of a Big City" int'l environmental forum held in Russia
By Xinhua Published: Mar 25, 2026 11:10 AM
A mobile air monitoring system is exhibited at the Ecology of a Big City international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)

A mobile air monitoring system is exhibited at the "Ecology of a Big City" international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)


An automated vehicle emissions testing device is exhibited at the Ecology of a Big City international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)

An automated vehicle emissions testing device is exhibited at the "Ecology of a Big City" international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)


A model of a vessel designed to handle oil spills is exhibited at the Ecology of a Big City international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)

A model of a vessel designed to handle oil spills is exhibited at the "Ecology of a Big City" international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)


An acoustic detection system is exhibited at the Ecology of a Big City international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)

An acoustic detection system is exhibited at the "Ecology of a Big City" international environmental forum in St. Petersburg, Russia, March 24, 2026. The forum kicked off here on Tuesday, attracting more than 6,000 participants. (Photo by Guo Feizhou/Xinhua)