Original: Robert Costanza (born 14 September 1950) is an American ecological economist and the Gund Professor of Ecological economics and Director of the Gund Institute for Ecological Economics at the University of Vermont.
Simplified: Robert Costanza (born 14 September, 1950) is an American ecological economist and the Gund Professor of Ecological economics and Director of the Gund Institute for Ecological Economics at the University of Vermont.