A group dressed in astronaut-inspired survival suits pick up litter at a park in Shijiazhuang, Hebei Province on April 14, as part of a campaign to promote environmental protection. According to participants in the activity, entitled "Future of No Future", mankind will be forced to wear protective suits in the future if we continue polluting the environment. Photo: Chinanews.com

The group cleans up litter while holding placards promoting environmental protection at a park in Shijiazhuang, Hebei Province on April 14. Photo: Chinanews.com

Park visitors snap photos during the activity in Shijiazhuang, Hebei Province on April 14. Photo: Chinanews.com

Photo: Chinanews.com

Photo: Chinanews.com

Photo: Chinanews.com