These usually fade after a week, but it may take months to regain a sense of natural well-being.

BBC: Factfile on drugs

With the goal of uniting conservation, communities and sustainable travel, TIES is dedicated to promoting ecotourism, which is defined as "responsible travel to natural areas that conserves the environment and improves the well-being of local people" (TIES, 1990).

CNN: The International Ecotourism Society statement

"There is a lot of work on the beneficial effects of visiting natural environments, but our findings suggest it is time to move beyond a simple urban versus rural debate and start looking at the effect that different natural environments have on people's health and well-being, " said Dr White.

BBC: People really do like to be beside the seaside, study says

Clean water is essential to the health and well-being of people, preserving the integrity of the natural environment and sustaining our economies.

UNESCO: MEDIA SERVICES

Uphold the right of all, without discrimination, to a natural and social environment supportive of human dignity, bodily health, and spiritual well-being, with special attention to the rights of indigenous peoples and minorities.

UNESCO: Understanding sustainable development

Under WMO leadership, National Meteorological and Hydrological Services contribute substantially to the protection of life and property against natural disasters, to safeguarding the environment and to enhancing the economic and social well-being of all sectors of society in areas such as food security, water resources and transport.

UNESCO: Social and Human Sciences

The Energy and Climate Change Committee (at 9am) looks into energy prices, profits and poverty with a series of academics and the Environmental Audit Committee (at 10.30am) has its first evidence session on "well-being", a policy approach which attempts to apply the idea of natural capital, to public policy making.

BBC: Week ahead