Heather Coste, director of ecological sustainability for the Sisters of St. Joseph-Brentwood, presents an eight-acre meadow that is now lush with native grasses and plants following a controlled burn in April. The site is now prime habitat for native pollinators such as wild bees, moths, wasps, butterflies, and birds that do most of the pollination chores in nature. (Photo: Bill Miller) BRENTWOOD — A tiny spot of upturned dirt, lightly hidden by…