The latest data available (for 2003) of The Living Planet Report 2006 by WWF indicated that the ecological footprint of the humankind, has more than tripled since 1961. The humankind′s ecological footprint has now exceeded the erath′s ability to regenerate by about 25%. The other index in the report, the Living Planet Index, showed a rapid and continuing loss of biodiversity-populations of vertebrate species have declined by about one third since 1970.The biggest contributor to humankind′s ecological footprint is the way in which human produce and use energy. The Living Planet Report indicated that human reliance on fossil fuels to meet energy needs continues to grow, and the greenhouse gas emissions that results in climate change has now made up 48% of global footprint. The comparison of the humankind′s ecological footprint with Human Development Index showed that current human development continues to deviate from the road of sustainable development, and unfair development among and between the generations is even worsening. The way leads to sustainability may still remote and long.