U.S. President Barack Obama says inaction on climate change could leave future generations with an "irreversible catastrophe ." Mr. Obama called on global leaders Tuesday to move "boldly, swiftly, and together" to combat the problem. Mr. Obama addressed world leaders gathered in New York City for a climate change summit called by U.N. Secretary-General Ban Ki -moon. Mr. Ban opened the meeting by saying it would be "morally inexcusable" not to act. NEW YORK (Reuters) - Presiden Continue reading ...