assumptions, but the United States' relative role in future emissions is expected to decline over time as developing nations pursue economic growth objectives. There are no important natural constraints on the release of fossil fuel carbon. Carbon release from land-use change can be large, but cannot attain the scale of fossil fuel use. The Montreal Protocol and subsequent amendments are expected to reduce global emissions. The Clean Air Act Amendments of 1990 implement the United States phase-out of CFCs. These emissions trends in conjunction with recent findings of a counterbalancing indirect (cooling) effect of CFC emissions through O, depletion result in a lessened concern about future greenhouse contributions by CFCs. Thank you, Mr. Chairman. I would be pleased to answer questions. |