How energy was preserved 50 years ago?

Fifty years ago, energy preservation primarily focused on practices such as using less electricity through energy-efficient appliances and implementing conservation measures like turning off lights and reducing heating. The oil crisis of the 1970s highlighted the need for energy conservation, leading to government initiatives promoting public awareness and the development of energy-efficient technologies. Additionally, many households relied on insulation and passive solar design to reduce heating and cooling needs. Overall, the emphasis was on manual conservation efforts and rudimentary technologies compared to today’s advancements.