Celebrate Earth Day by considering the ways you can address climate change at home, with practical advice from a scientist who's seen its effects around the world. Then hear from a culinary historian about the crops, farm animals, and agricultural traditions that we risk losing in America. And mark Shakespeare's birthday by learning how his works have played a key role in shaping Africa's newest nation and by getting tips for enjoying a visit to his hometown of Stratford-upon-Avon.

• Dr. Heidi Roop, author of "The Climate Action Handbook" (Sasquatch Books)
• Culinary historian Sarah Lohman, author of "Endangered Eating: America's Vanishing Foods" (W. W. Norton)
• British tour guide Gillian Chadwick
• British tour guide Roy Nicholls
• Edward Wilson-Lee, author of "Shakespeare in Swahililand" (Farrar Straus Giroux)

• Dr. Heidi Roop is the director of the University of Minnesota Climate Adaptation Partnership, and an assistant professor of climate science and extension specialist there. She's the author of "The Climate Action Handbook."
• The Intergovernmental Panel on Climate Change assesses the science related to climate change.
• Culinary historian Sarah Lohman is the author of "Endangered Eating: America's Vanishing Foods."
• The Johnny Appleseed Museum in Urbana, Ohio, is open Tuesday through Thursdays.
• Sarah Lohman describes culinary traditions for the American Thanksgiving holiday on Travel with Rick Steves program #735 in November 2023.
• British tour guides Gillian Chadwick and Roy Nicholls can be reached from the Facebook page for Great British Tours.
• The Royal Shakespeare Company includes options for getting to their venues at Stratford-upon-Avon on their website.
• Edward Wilson-Lee was raised in Kenya, teaches literature at Cambridge, and is the author of "Shakespeare in Swahililand."
• A video promo for the South Sudan Shakespeare Company's production of "Cymbeline" in Juba, from the start of the new nation in 2011.
• The UN Refugee Agency explains how South Sudan remains Africa's largest refugee crisis.