How did Edward Barbier define "Sustainable development"?

Increasing the rate of resource regeneration Increasing the standard of living of poor Increasing moral values of current generation All of the above

Increasing the standard of living of poor

Edward Barbier defined sustainable development as one which increased the living standard of poor people. It can be measured in quantitative terms. For example: increased income, real income, educational services, health care, sanitation, water supply etc.