How did the Guadalupe river become polluted?

Nbl what does it stand for? What is the roller coaster code in Mario super sluggers? What three contries have a coastline of the red sea? How long does it take to get from tampa to Universal Studios in orlando? How long is the confluence of Zambezi river? How long is the chao Phraya river? How does the ridge-rift in the pacific ocean differ from that in the Atlantic ocean? What country claimed Oregon because balboa discovered the Pacific Ocean? What colour is the forbidden city? Did the Nok use their knowledge of the desert to lead caravans across the Sahara? Where is the hypothluamus located? What overhangs at the top of the waterfall? What are the two large rivers that feed directly into the Amazon? What mountain ranges is the highest Pocono Allegheny or Appalachian? What river rises in central Africa flows northward then makes a great bend toward the west and finally empties in the Atlantic ocean? What part of the ocean is the abyssal zone in? They include arches loops and whorls? What country has the most points of interest? What is the economic importance of river Rhine? What were some issues building Sydney harbor Brudge?