roxanne ramirez, mckinsey green, dawn barka. >> my name is dr. krieger. i am the founder and executive director of save the frogs, the only charity dedicated to protecting amphibians. they're the most rapidly disappearing animals on earth. i am here to support the legislation. over 2000 amphibian species are on the verge of extinction worldwide. it is one of the greatest environmental crises on the planet. i am representing thousands of supporters worldwide who have sent in letters to the board of san francisco. they're asking you to support legislation to protect the sharp park wetlands. they are crucial to our environment. 80% of america's wetlands have been destroyed. frogs are very important in the ecosystem. we are in support of a world where humans do not destroy every last bit of habitat on the planet. that is what is happening now. sharp park, death by a thousand cuts is the term for slowly destroying every habitat. many frogs are already extinct in california. let's do something to keep san francisco the leader o-- the whole world looks to califo