Once you have completed the standard upgrades for your faith-building, you can look into taking it one step further by installing renewable energy sources. Solar panels are becoming a popular option for increasing your sustainability while reducing your carbon footprint. Adding solar panels is an expensive upfront deep retrofit, but can result in long-term benefits.
CoEnergy/Ottawa Renewable Energy Co-operative (OREC)
CoEnergy is an Ottawa-based cooperative working towards the transition to a low-carbon economy in Eastern Ontario and West Québec while fostering local economic development and energy democracy. They develop community-owned energy efficiency, renewable energy, and electric transportation projects.