41.   The United States and China disagree on who is responsible for reducing global carbon emissions.

42.   The United States insisted the deal allowed it to use its huge forests to avoid reducing carbon emissions.

43.   As a possible response to global warming, Whitman raised the possibility of the administration supporting legislation that would for the first time regulate carbon emissions.

44.   By doing so, they could sell off their carbon emissions as credits.

45.   Disputed issues included reporting and verifying carbon emissions and establishing inventories of forests and range land.

46.   He and other environmentalists argue the technology exists to curtail energy use and cut carbon emissions without economic disruption.

47.   He urged governments to begin steps to phase out fossil fuels, the primary source of carbon emissions.

48.   Legislation calling for controls of carbon emissions from power plants was introduced earlier this year, but never was seriously considered by lawmakers.

49.   Maybe the total quantity of carbon emissions will be equivalent to the United States one day.

50.   Saleh noted some European countries are considering introducing a so-called carbon tax, which would be levied on fuel based on its carbon emissions.