Susan is writing a speech about the importance of recycling that she plans to present to her community leaders. Which sentence would be the best supporting detail based on her purpose?

Options;
A. Air pollution is becoming a major problem in the world today.
B. In 2006, there were more than $1.2 billion worth of recyclables thrown away.
C. Carpooling is a great way to help cut down on the use of natural resources.
D. Large cities have a bigger problem with waste than small cities.

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