The 2024 City Nature Challenge is in full swing THIS WEEKEND during which a series of nature walks and events have been organised throughout the challenge which started on Friday and ends TOMORROW. Originating as a friendly competition between San Francisco and Los Angeles in the US in 2016, the challenge has blossomed into a worldwide phenomenon, with cities across the globe joining forces to observe and document the natural world in urban environments. 24 South African cities and regions are participating in City Nature Challenge 2024. Bongiwe Zwane spoke to Ednah Sekwakwa, Deputy Director for Marketing and Communications at the South African National Biodiversity Institute - SANBI - .