By Sonal Gupta, Local Journalism Initiative Reporter, Canada’s National Observer A 130-year-old Indigenous longhouse is leading the charge toward energy independence for an Ontario community — and showing how their cultural values can fuel the future. The project, led by the Cayuga Nation of the Six Nations of the Grand River, aims to reduce reliance on energy sources such as propane for heat and power by integrating clean energy solutions with their cultural traditions. The Sour Springs Longhouse, built in 1892, is an important ceremonial site for the Six Nations community in southwestern Ontario. In 2022, the community undertook a three-phase renovation, which includes energy-efficient retrofits, the installation of a 24-kilowatt hybrid solar photovoltaic (PV) system, and the construction of a low-carbon seed storage facility. But first, it was a…