What is the fine-grained topic of the following text: “The wetlands at Sharp Park are critical to the survival of the endangered California red-legged frogs that live on the property, so it is essential that the City of San Francisco conducts a thorough environmental review before continuing to pump the wetlands out to sea,” said Kerry Kriger, executive director of Save the Frogs! Only return the topic.
Protection of California red-legged frogs in Sharp Park's Wetlands