e ‧ co ‧ sys ‧ tem /ˈiːkəʊˌsɪstəm, ˈiːkəʊˌsɪstɪm $ ˈiːkoʊ-/ BrE AmE noun [countable]
all the animals and plants in a particular area, and the way in which they are related to each other and to their environment ⇨ ecology
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▪ the environment the air, water, and land on Earth, which is affected by man’s activities:
We need to do more to protect the environment.
How much does air travel damage the environment?
▪ ecosystem technical all the animals and plants that exist in a place, considered as a single system with parts that depend on each other:
the island’s fragile ecosystem
The rapid decline in the number of great sharks is disrupting the marine ecosystem.
▪ habitat the natural home of an animal or plant:
The tree can grow to be 120 feet tall in its natural habitat.
▪ the biosphere technical the Earth’s surface and atmosphere where animals and plants can live:
Scientists are monitoring changes in the global biosphere.
▪ ecology the scientific study of the way in which the animals, plants, and natural features of a place affect and depend on each other:
She’s studying marine ecology.
▪ green adjective [only before noun] relating to the environment or to protecting the environment:
Voters are becoming more concerned about green issues.
The party is keen to demonstrate its green credentials (=show that it thinks the environment is important) .
▪ eco- prefix relating to the environment and protecting the environment:
eco-friendly products (=which do not harm the environment)
eco-tourism (=which does not harm the environment)
eco-warrior (=someone who protests to try to save the environment)
eco-sensitive land (=where the environment is easily damaged)