World leaders at the United Nations conference in Copenhagen, Denmark cannot seem to agree which countries should be curbing green-house gas emissions. So far, the two-week conference has led to no major decisions.

The talks so far have been marked by disagreements between China and the U.S. and between poor nations.

Organizers still hope to break the deadlocks that could mean no major accomplishments that were expected to be presented to President Barack Obama, Chinese Prime Minister Wen Jiabao and more than 110 other world leaders arriving for Friday's finale.

Meanwhile, a new Zogby poll shows more Americans are not so worried about global warming.

Nearly half of Americans said they are only slightly or not at all concerned about climate change. That is a full ten points higher than a poll taken two years ago.