Cantor spokesman Brad Dayspring points to this this report from AFP:

G8 plans for deep cuts in global greenhouse gas emissions began unravelling on Wednesday shortly after leaders signed on to the deal as Russia rejected a key plank as "unacceptable". G8 leaders agreed to bear the brunt of steep global cuts in greenhouse gas emissions, calling on a broader bloc of developed countries to reduce pollution by 80 percent by 2050. ...

But the ink was barely dry on the agreement when it ran into Russian opposition. "For us the 80 percent figure is unacceptable and likely unattainable," said Arkady Dvorkovich, Russian President Dmitry Medvedev's top economic aide. "We won't sacrifice economic growth for the sake of emission reduction," he told reporters.

Said Dayspring, "When Russian officials find the goals of the Administration, Speaker Pelosi, and House Democrats too far left and not conducive to economic growth, it kinda tells you something."