A jiya, Ma'aikatar Harkokin Cikin Gida ta fitar da jerin manyan ayyuka 101 na kiyaye muhalli a fadin kasar. An gano waɗannan ayyukan a matsayin wani ɓangare na Ƙaddamarwar Babban Waje na Amurka. Ayyukan California guda biyu sun sanya jerin sunayen: Kogin San Joaquin da Titin Kogin Los Angeles & Inganta Titin Kogin San Gabriel. Don ƙarin bayani game da waɗannan da sauran ayyukan a cikin ƙasar, ziyarci Babban Waje na Amurka: Alkawari ga Al'ummomi masu zuwa.
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