The city of North Las Vegas and a plant advocacy nonprofit gave away 200 free trees to valley residents Saturday, drawing long lines to Nicholas E. Flores Jr. Park before the event began. Lisa Ortega, executive director of Nevada Plants, said the giveaway — aimed at helping cool down the valley by adding more shade — was the largest the group has hosted. It started at 8 a.m., and within 45 minutes, all 100 fruit trees, including apple, plum and apricot varieties, had been claimed. Another 100 shade trees, including oaks and acacias, had also been lined up in the park’s parking lot for picking. Volunteers from local arborist businesses helped residents select one tree per household and offered guidance on proper care. City workers then assisted with loading the plants into vehicles. “We have a responsibility, not only to create shade for people, but also to clean the air,” Ortega said.…