Floriade is a huge horticulture exhibition taking place every 10 years. It's in the Dutch city of Almere this year. For 6 months, visitors will see displays of plants and flowers, horticultural innovation – and proposed solutions to global environmental problems, especially in the area of urban housing.

Matthew Kenyon has been to visit and hear about the challenges of putting it together during the pandemic and the costs and benefits to the local area of hosting it. Plus a look at some of the displays and questions over whether there is a future for these big, set-piece events.