An authority for arboricultural good practice, the Association delivers professional standards and guidance to industry and others, facilitating the responsible and competent management of trees.

The world’s biggest group of professional arborists with over 20,000 members distributed throughout 38 ``Chapters`` across the 5 continents.

The BES’s many activities include a range of scientific literature, the organisation and sponsorship of a wide variety of meetings, the funding of numerous grant schemes, education work and policy work.

The Green Infrastructure Partnership is a rapidly growing network of people and organisations that support the creation, enhancement and promotion of green infrastructure in the UK.

Established in 1999, the Resilience Alliance is an international, multidisciplinary, collaborative research organization that explores the dynamics of social-ecological systems.