Matthaei Botanical Gardens & Nichols Arboretum hosts regular, free educational programs and presentations on a variety of environmental, horticultural, and cultural topics. Tonight's presentation is by HGTV host Jeff Wilson, who tells the story of his family’s Deep Energy Retrofit (DER) of their 70 year old home to slash their energy bills by 85% while making their home a more comfortable and healthier place to live. Presented by Sierra Club Huron Valley Group. Free.