Ecosystem services (ES) can also be named as ecosystem or environmental services.
The Millennium Assessment classification of environmental or ecosystem services proposes dividing them into four classes: support, provisioning, regulation, and cultural.
The pollination is one of the clearest examples of environmental services regulation . Much of the vegetable, fruit and seed crops need to be pollinated by pollinating insects, such as bees , to transport pollen and promote fertilization.
Due to human action (direct or indirect) and biological and geological processes, ecosystems undergo changes. The different social agents will face these changes differently for economic, cultural and socio-political reasons. Which implies that it does not have an equitable and homogeneous impact on all social agents.