The Vice-President of the Conservation Foundation in Washington, DC and renowned ecologist Sir Frank Fraser Darling explores the concept of Man's responsibility for his natural environment in his Reith series entitled 'Wilderness and Plenty'. In his second lecture entitled 'Impact of Man on His Environment', Sir Fraser Darling explores the continuous affect of man on his natural habitat. Taking examples from prehistoric man, the industrial revolution and modern day technology, he considers whether man has taken all he can from the world to increase growth and development. He explores and criticises how politics and political policies have had a lasting affect on the contamination of the world and its ecology.