30 Second PROMO FOR WEEK OF JULY 22-26 I’m Cecilia Nasti inviting you to tune into Passport to Texas…when I tell you about giant Salvinia, an aquatic invasive plant that double in size every seven to ten days, blocking sunlight to native plants and animals below the water’s surface…we also meet the man who’s responsible for the iconic wooden signs with yellow lettering you see in all Texas state parks …on Passport to Texas…your radio guide to the Great Texas Outdoors.