Answer:
She mentions that more than ninety percent of the big fish in the ocean have been fished and eaten. That almost half of the coral reefs are dying and disappearing. She also mentions how oxygen levels are decreasing causing the ecosystem and wildlife to die.
*WARNING*
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Explanation:
The first minute of the talk:
"I want to share with you my personal view of changes in the sea that affect all of us, and to consider why it matters that in 50 years, we've lost -- actually, we've taken, we've eaten -- more than 90 percent of the big fish in the sea; why you should care that nearly half of the coral reefs have disappeared; why a mysterious depletion of oxygen in large areas of the Pacific should concern not only the creatures that are dying, but it really should concern you. It does concern you, as well."
