Barack Obama

Speaking July 9 at the G8 meeting in L’Aquila, Italy, President Obama said climate change is one of the “defining challenges of our time” and can no longer be ignored.

G8 leaders agreed that by 2050, developed nations will reduce carbon emissions 80 percent below a base year that was not specified. They also agreed to work with other nations to cut overall global emissions in half.

Obama acknowledged that developed and developing nations have different priorities because of their differing levels of economic development. Developing nations do not want to “sacrifice their aspirations for development and higher living standards,” but they must be active participants in a climate change solution, Obama said.

On the other hand, developed nations have “the much larger carbon footprint per capita,” Obama said, which carries a “historic responsibility to take the lead.”

“I know that in the past, the United States has sometimes fallen short of meeting our responsibilities. So let me be clear: Those days are over,” Obama said.

For more, see “G8 Nations Agree to Cut Carbon Emissions 80 Percent by 2050.”