be dependent on

See: rely
References in classic literature ?
But a plant on the edge of a desert is said to struggle for life against the drought, though more properly it should be said to be dependent on the moisture.
ON's decision to abandon nuclear projects at Wylfa and at Oldbury on the Severn estuary, if EDF or another nuclear firm does not step in, Britain will be dependent on rapidly developing forms of renewable energy that have significant disadvantages.