FILE PHOTO: A woman walks among rain pipes at the Advanced Drainage Systems exhibit area at the 47th Annual World Ag Expo in Tulare, California, February 12, 2014. REUTERS/David McNew/File Photo
FILE PHOTO: A woman walks among rain pipes at the Advanced Drainage Systems exhibit area at the 47th Annual World Ag Expo in Tulare, California, February 12, 2014. REUTERS/David McNew/File Photo