Ecology. Arizona ecologist puts stamp on forest restoration debate.
D003247:Conservation of Natural Resources; D017753:Ecosystem; D005380:Financing, Government; D005390:Fires; D016468:Forestry; D049674:History, 21st Century; D028223:Pinus; D011057:Politics; D015206:Southwestern United States; D014197:Trees; D014481:United States