Dozens of events are set to take place, highlighting work being done by groups in the area who are campaigning to protect wildlife, cut energy use, encourage active travel, and reduce waste.
The Havant programme is part of the national Great Big Green Week, and will take place from September 24 to October 2.
The programme includes an EcoFair in Havant Park and the Pallant on September 24 with stalls, music and activities, followed by a sustainable fashion show at the Havant campus of Havant and South Downs College on September 29.
Here, students will showcase outfits they have made using upcycled materials.
Student block in Portsmouth on Wingfield House car park gets planning permission…
There will also be talks on wildlife gardening and wilding projects, nature walks, litter picks, working parties, family activities such as making bug hotels, a film at the Spring Arts Centre, and bike events.
People are invited to take appliances to the Repair Café at the Pallant on October 1, and a new one will be launched on Hayling Island on September 24.
Art by local children will be on display in the Meridian Centre and the Plaza and there will be
advice sessions on reducing your waste and on cutting energy in the Meridian Centre.