The Kentucky Derby is the biggest horse race in America, and preparing for it takes millions of dollars and thousands of people. We went to Churchill Downs days before the big race to see what it takes to train the winning horse and prepare the century-old track for 400,000 fans.
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Worshippers in India buy thousands of tons of flowers every day to give as offerings in temples. The rituals leave behind mountains of flower waste that often end up contaminating already troubled rivers.
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