I am compiling a list of approaches under the umbrella of nature-based solutions (NbS), starting with those approaches listed by IUCN (see below). If you know other NbS approaches, please add to the list. Thanks!
Ecological restoration
Ecological Engineering
Forest landscape restoration
Ecosystem-based adaptation
Ecosystem-based mitigation
Climate adaptation services
Ecosystem-based disaster risk reduction
Natural infrastructure
Green infrastructure
Integrated coastal zone management
Integrated water resources management
Area-based conservation approaches, including protected area management