Cash generated by the regular operations of a business;
usually computed as net income plus or minus the effects of other current assets and current liabilities on cash flows,
plus noncash expenses deducted in arriving at net income, minus noncash revenues included,
less certain gains and plus any losses that are included in the total proceeds received from sale of fixed assets.

Juanita and sam attend a beach party and notice that the local beach appears to have a great deal more trash washed up on shore than it did when they were young. the water doesn't appear nearly as clear, and there seems to be less evidence of small water creatures living in the shallows. an afternoon at the local library convinces them that one major cause is the new factory nearby. after some discussion, they decide their next step should be identifying the cause of the changes identifying the problem picketing the guilty factory lobbying their elected representatives to complain about the problem talking to a local environmental group about solutions