There are many difficult achievements in "Ice Steam Age 2", and green energy is one of them. To achieve this achievement, you only need to supply at least 300 units of heat energy through steam, while ensuring that no pollution occurs. However, this is still very difficult.
How to achieve Green Energy Achievements in Ice Age 2
Green energy
Supply at least 300 units of heat energy requirement via steam while ensuring no contamination
In other words, use geothermal energy to meet 300 or more heat needs without slums.
To achieve the achievement, you need a map with geothermal nodes. You need to actually use the steam to heat the area, not just produce it.
