To the Editor: Great articles in this issue, as usual. I know there’s an Earth Day cleanup at Lone Tree Hill, but can knowledgeable volunteers help with the removal of invasives and planting of natives that Jeffrey North described? Art Kreiger Jeff North responds: Thank you for your letter, Mr. Kreiger. Watch these pages for future announcements of volunteer days for invasives removal and restorative planting. The stewards of Lone Tree Hill are eager to organize volunteers for pulling garlic mustard and other restoration work as soon as we can safely gather. Look for an initiative following examples such as [READ MORE]