As Alex works on the body of her speech on agricultural pollutants and their effects on global warming, she continues to gather evidence and organize it into a logical structure to support her main claim. Which one of the following pieces of evidence would best fit into a section of her speech highlighting specific corporations and the contribution they are making to overall pollution levels.
a definition of "toxic sludge," along with a statement detailing which corporations produce the greatest amounts of sludge
the exact dollar amount spent annually by all U.S. agricultural corporations on the cleanup of environmental pollutants
the exact number of agricultural corporations in the U.S. which produce measurable carbon dioxide and methane emissions
a statistic stating the annual carbon dioxide and methane emissions of each of the "Big Three" agricultural corporations in the U.S.
