Hyderabad, June 30: What do trees and plants have to do with the research output of an institution? Scientists at the National Geophysical Research Institute in Hyderabad believe that greenery on their campus is helping them produce more research papers than their counterparts elsewhere in the world. The NGRI has about 16,400 trees on its campus at Habsiguda. It is going to lose about 300 trees to road widening which the institute plans to compensate by planting 4,000 trees.