(informal) beneficial (or at least harmless) to the ecology of a region

A large concrete block with a groove in the bottom face and a tongue on the top face to eliminate slippage when they are stacked. There is also a steel loop on the top face to facilitate lifting. The blocks are stacked in an offset manner to create a wall for retaining earth by means of their great mass. A wall built with them can be readily dismantled and the blocks reused (in ecological fashion).

the study of the effects of chemical compounds on the interactions of living organisms

The application of the principles of ecology to the restoration of derelict, degraded and fragmented ecosystems.

A measure of how much biologically productive land and water area an individual, population or activity requires to produce all the resources it consumes and to absorb the waste it generates using prevailing technology and resource management practices.

plural of ecological service

Any beneficial natural process arising from healthy ecosystems, such as purification of water and air, pollination of plants and decomposition of waste.

(geography) A geographic approach that emphasizes human-environment relationships.

plural of ecology block

An ecological and environmental philosophy that advocates the inherent worth of living beings regardless of their instrumental utility to human needs.