Start your 2025 year list off on this easy 90-minute walk from the main gate to the ponds and back. In addition to looking for winter birds we will admire the Arboretum's impressive woody plant collection.

The Arnold Arboretum has an over 150 year legacy of preserving native and exotic species in an ever changing global environment. This one hour tour will highlight some of the Arboretum's successes with endangered historic trees, current initiatives to preserve threatened species among its collection of some 16,000 woody trees, shrubs and plants, and the work the Arboretum has underway to meet future challenges from climate and habitat loss.

This 2-day workshop (January 10 and January 13) will expose participants from all schools, departments and disciplines at Harvard to an emergent data-driven geodesign framework for designing at the largest size imaginable – global – to identify feasible strategies to substantially reduce GHG emissions, the single most important global action available for countering cataclysmic global warming.

Participants will be assigned to represent national ‘climate-regions’ covering the entire globe (not necessarily their own, though local knowledge will help), focusing on a menu of possible climate mitigation project types, and their local and global spatial and temporal interconnections.) Based on initial proposed project-timelines of actions (Gantt charts) across the globe produced in Day 1, off-site computer simulations will be run over the weekend to predict likely climate modification outcomes. In Day 2, negotiation techniques will be used to find incremental improvements, resulting in an initial global strategic plan for carbon reduction.

No special prior experience is required. Geographic, cultural and disciplinary diversity is desired, and basic computer skills should suffice. A willingness to think big, and to engage in holistic systems thinking will help. We especially seek participants from or with experience in as many countries and climate regions as possible.

When gardens go dormant for the winter months, there are still certain species and cultivars that draw the eye with their bright berries, interesting seed pods, and spectacular bark. Join Warren Leach for a book talk on his new book, "Plants for the Winter Garden: Perennials, Grasses, Shrubs, and Trees to Add Interest in the Cold and Snow," and discover all that a winter garden has to offer. Warren Leach has years of gardening experience in the cold Northeast and will be sharing all of his winter garden tips, from plant selection and placement, to pruning techniques, to structural components that complement the plants themselves. And if you decide to buy a book after the program, make sure to look for some references to the Arnold Arboretum's own winter landscape!

Join us for a winter foraging walk to learn what wild plants can be foraged and brewed into tea. Visit some of the Arboretum's tastiest winter plants, from sweet birch and juniper to sassafras and spicebush. You may even get to taste some of the teas yourself! Led by Manager of Adult Programming and Events Sarah Nechamen.

Join us this winter at the Arboretum as we read and discover new things about the natural world. During this one-hour program for our youngest guests and their grownups, we will begin by reading a nature inspired story followed by a walk, activity, or craft to continue exploring the theme.

Our Freecycles have been so popular that we are hosting three this semester! The first one is in just under three weeks: January 28th. Bring any unwanted holiday gifts, and find something to re-gift to yourself! The Spring Freecycle dates are January 28th, March 11th, May 13th. We’ll be in the Harvard Commons in the Smith Campus Center, from 11am to 2pm on each date. If you haven’t been to a Freecycle before: bring your reusable goods you no longer need, and browse goods that others have brought. Check this page to keep track of Freecycle dates and to see others around campus, like HGSE's in a couple weeks!

Join the Harvard Alumni for Climate and the Environment and the Harvard Alumni for Agriculture and Food shared interest groups to meet the newly appointed Ray A. Goldberg Professor of the Global Food System at the Harvard Kennedy School, Professor Wolfram Schlenker. Professor Schlenker studies the effect of weather and climate on agricultural yields and migration, how climate trends and the US biofuel mandate influences agricultural commodity prices, and how pollution impacts both agricultural yields and human morbidity. He is a Research Associate at the National Bureau of Economic Research and serves on the Board of Reviewing Editors at Science. Please submit questions you would like to have asked here.