Recent research and expert observations highlight the significant benefits that exposure to nature offers for both mental and physical health. Baroness Katherine Willis, Professor of Biodiversity at the University of Oxford, has been examining how natural environments impact well-being, challenging the notion that any health improvements are merely the result of increased physical activity or reduced pollution.

Willis first encountered compelling evidence from a 1984 study in which patients recovering from gallbladder surgery in hospital rooms overlooking trees required less pain medication than those with views of brick walls. Building on this, she explored numerous studies demonstrating that spending time in natural settings triggers measurable physiological responses. These include lowered blood pressure, reduced heart rate, and decreased levels of stress-related hormones such as cortisol and adrenaline.

Scientific investigations have also found that natural environments emit molecules that produce chemical effects within the human body. For example, inhaling the scent of pine has been shown in clinical trials to induce calming effects within 20 seconds, lasting for up to 10 minutes. Additionally, certain bacteria found in plants can positively influence the gut microbiome in a manner similar to probiotics. Visual exposure to natural fractal patterns—complex, repeating forms found in tree branches and leaves—has also been associated with relaxation and reduced stress.

However, access to such health-promoting green spaces remains uneven. A recent study revealed that over 7.4 million people in England live in areas lacking immediate access to natural environments. This disparity has significant implications, as research involving two million people in Wales over a decade found that the greater the distance from green or blue spaces, the higher the likelihood of common mental health disorders.

Socioeconomic factors further compound this issue, with deprived communities often having the least access to nature-rich areas despite potentially gaining the most benefit from them. Experts argue that nature should be treated as critical infrastructure alongside transport and utilities, advocating for the integration of green spaces in urban planning and housing developments.

Efforts such as the National Trust’s Nature = Future campaign aim to raise political awareness, with tens of thousands of letters sent to government officials urging increased investment in accessible green areas. Emphasizing the importance of early exposure, experts also stress the need for children to have regular interaction with natural environments to foster long-term health and well-being.

In light of these findings, health specialists encourage individuals to spend at least 20 minutes several times a week in natural settings, such as parks or woodlands, to harness the documented physical and mental health advantages that nature provides.