In the mid 1980s, scientists unlocked the genetic keys to manipulating our world. Suddenly everything seemed possible! There would be no more hunger or malnutrition; diseases would be vanquished and poverty wiped out. But twenty years on the situation looks very different. From the loss of biodiversity to health scares about GM food, the effects of genetic technology are prompting more and more debate. Our documentary this week is an intelligent look at both sides of the issue.