What are the five major earth system research plans of the International Union of Science and Earth Sciences 1986?

The Earth System Science Partnership (ESSP) is an integrated research consortium of the Earth system, which consists of the following four global environmental change plans:

(1) World Climate Research Programme (World

(2) international geosphere-biosphere program;

(3) International Human Factors Program for Global Environmental Change (IHDP);

⑷ International Biodiversity Science Plan (D Ⅳ er Sitas).