9-Letter Words Starting: ECO

• use cautiously and frugally

• spend sparingly, avoid the waste of

• A person with a passion for protecting the natural environment; an ecological activist.

• a system formed by the interaction of a community of organisms with their physical environment

• The portion of the atmosphere from sea-level to about 4000 meters in which it is possible to breathe without technological assistance.

• The biosphere

• the branch of social science that deals with the production and distribution and consumption of goods and services and their management

• an expert in the science of economics

• spend sparingly, avoid the waste of

• use cautiously and frugally

• the system of production and distribution and consumption

• the efficient use of resources

• frugality in the expenditure of money or resources

• an act of economizing; reduction in cost

• a biologist who studies the relation between organisms and their environment

• the environment as it relates to living organisms

• the branch of biology concerned with the relations between organisms and their environment