People's connection to nature has declined by more than 60% since 1800, almost exactly mirroring the disappearance of nature words such as river, moss and blossom from books, according to a study. The study by Miles Richardson, a professor of nature connectedness at the University of Derby, accurately tracks the loss of nature from people's lives over 220 years by using data on urbanisation, the loss of wildlife in neighbourhoods and, crucially, parents no longer passing on engagement with nature to their children. In the research published in the journal Earth, Richardson also identified the disappearance of natural words from books between 1800 and 2020, which peaked at a 60.6% decline in 1990. The modelling predicts an ongoing "extinction of experience" with future generations continuing to lose an awareness of nature because it is not present. Increasing the availability of biodiverse green spaces in a city by 30% may look like radical positive progress for wildlife and people but Richardson said his study suggested a city may need to be 10 times greener to reverse declines in nature connection. Measures to increase popular engagement with the natural world were not effective at reversing long-term declines in nature connectedness. More effective, according to the study, are measures instilling awareness and engagement with nature in young children and families, such as forest school nurseries.