The immense diversity of life on Earth is not spread evenly, but is concentrated in very special places. Nearly two-thirds of the Earth's plants occur on just 17% of the land, and protecting it would protect all of those plant species.And according to Lester Brown in his latest book, World on the Edge, restoring the economy's natural support systems - reforesting the earth, protecting topsoil, restoring rangelands and fisheries, stabilizing water tables, and protecting biological diversity- would cost just $110 billion a year.
