Part two of a six-part series on pollution. The ways man has succeeded, and failed, to duplicate in his cities checks and balances of natural environment.

The third program in a six-part series about pollution. This program shows how water is distributed.

Fourth program in a six-part series on pollution. The program show history of air pollution from advent of coal-burning in 14th Century.

Fifth in a six-part series on pollution. All pesticides are poisonous in greater or lesser degrees.

Final program of a sub-series on pollution and conservation. This program offers statements and observations by experts on extent of pollution in world today and what can be done to improve it.

A 24-hour day in life of a young family physician, Dr Reg Perkin, covering everything from his 7 am jogging to his 10 am tonsillectomy operation.

Every year, over 12,000 Canadians are born with serious inherited defects. Maureen McChesney, 12, is one.

This program focuses on research into effects of drugs on cancers in mice being conducted by internationally renowned cancer team at Toronto's Princess Margaret Hospital.

A study of how medical researchers are using animals to determine effect of drugs such as marijuana and LSD, and.

The theme of biology for past 20 years has been origin of biological constancy. The theme of next 20 years will be origin of biological diversity.

One quarter of all Canadians will be affected some time in their lives by arthritis.

A look at coronary thrombosis which kills three out of ten adults; heart research in Canada.

History and research in field of organ transplants.

When is a man dead? Canadian physicians discuss medical, ethical and legal questions involved with death, organ transplants.

A look at luxuriant parks and reserves where various species of wild animals and birds still survive.

First in a three-part series visiting some of Canada's 700 museums in an attempt to show how people of all ages use them for self-discovery.

Africa as it was during 18th and 19th centuries. Final program in this season's series.

Second in a series of three programs on Canada's museums. This program presents views from adults - those who feel past has no relevance to their lives, and others who find themselves culturally enriched by past.

A look "backstage" at Ontario Science Center, Royal Ontario Museum and Old Fort Henry.

Recent advances in oceanography.

The theory that Earth's continents are moving is examined.

Research on new electronics and mechanical devices to help blind and deaf realize true sensory perception.

The latest observations of astronomers have turned up new kinds of stars; mysterious emanations from deep in space called pulsars and quasars.

Research into physics of sound and hearing has caused increasing alarm among scientists and physicians about effects of high noise levels upon people, and destructive psychological and physical effects of constant noise pollution.

The physics of energy and problem of producing large quantities of energy with little pollution form basis of this program.

The qualities of laser and normal light are contrasted. Final program in series.