They work through policy to improve water quality in Iowa and downstream in the Mississippi River and Gulf of Mexico.
ພວກເຂົາເຮັດວຽກຜ່ານນະໂຍບາຍເພື່ອປັບປຸງຄຸນນະພາບນ້ໍາໃນໄອໂອວາແລະລຸ່ມນ້ໍາໃນ Mississippi River ແລະ Gulf of Mexico.