Scottish Natural Heritage Natural Capital Accounts

SNHWe worked with SNH to test natural capital accounting approach for the land they own or substantially manage as National Nature Reserves. The natural capital balance sheet includes the following benefits: food, energy, carbon sequestration, air quality, physical health, recreation & tourism, education & volunteering and wildlife.

The annual benefits are estimated at £28 million which is a conservative estimate as many benefits (such as flood risk management) are not covered.

But even this conservative estimate shows that the benefits are 8 times the "cost" of maintenance. In fact, we should really call this “investment” in maintenance.
Summary and full reports can be downloaded from here.