Complex sentence: From 1970 to 1974, he was the editor of "Survival" magazine and in 1975 he co-founded the Canadian Coalition for Nuclear Responsibility, and has been its president since 1978.
Split into simpler sentences: From 1970 to 1974, he was the editor of "Survival" magazine. In 1975 he co-founded the Canadian Coalition for Nuclear Responsibility, and has been its president since 1978.