Biodiversity refers to the variety of life forms on Earth, encompassing the different species, ecosystems, and genetic variations that exist.

Earth Day is an annual event celebrated on April 22nd to promote environmental awareness and protection.

Ecological economics, bioeconomics, ecolonomy, eco-economics, or ecol-econ is both a transdisciplinary and an interdisciplinary field of academic research addressing the interdependence and coevolution of human economies and natural ecosystems, both intertemporally and spatially.

Ecology is the branch of biology that studies the interactions between living organisms and their environment.

An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

The Wikipedia page titled "Endangered species" provides information about a classification system that identifies and lists species that are at risk of extinction.

Energy is the capacity to do work or produce heat.

Environmentalism, also known as environmental rights, is a social and political ideology focused on the protection of the environment and conservation of natural resources.