longer life spans will have dire environmental and social consequences



William K. Shireman : futurist
If human life spans are increased to 100 years or more, the result will likely be excessive world population growth. Results could include increased global warming, more wars both within and between nations, major increases in refugees, more crowding in urban slums, increased potential for the spread of disease, and a perception that the quality of life is diminished.


http://www.wfs.org/Forecasts_From_The_Futurist_Magazine