The Midwest Renewable Energy Association (MREA) will feature a diverse and dynamic lineup of speakers for its 25th Anniversary Energy Fair from June 20 through 22 at the Renew The Earth Institute, in Custer, Wisconsin. Experts in the fields of open source technology, sustainable living, organic farming, race car driving and more will share their expertise.

Friday’s schedule includes keynote speaker Marcin Jakubowski, founder of the Open Source Ecology, a collaboration of engineers, producers and builders that is producing open source blueprints for civilization’s 50 most important machines. The Saturday morning keynote speaker is George Siemon, founding CEO and co-founder of CROPP Cooperative/Organic Valley.

Leilani Münter will speak Sunday afternoon; the biology graduate and environmental activist became the first carbon neutral race car driver in 2010. In every race she drives in, Münter adopts an acre of rainforest to offset the carbon footprint of her racecar.

Founded in 1990, the nonprofit MREA is dedicated to promoting renewable energy, energy efficiency along with sustainable living through education and demonstration.

Cost: adults, $15/day, $35/weekend; seniors and youth (13 to 18), $10/day, $20/weekend; MREA members and children under 12, free. Location: 7558 Deer Rd., Custer. For more information, call 715-952-6595 or visit MidwestRenew.org/energyfair.