Note: While detecting biomes may not be possible right now as of the next update biome data will be stored for each chunk.
What
A implementation that adjusts power generation based on the biome the generator is located in.
Why?
Right now no one uses power grids because anything that can be done in the power station can be done at their home without the energy loss/infrastructure costs. With this addition it becomes cheaper to use power generated in certain Biomes and have it sent to people who wish to live in a nicer biome.
Specific Rates
Solar Panels:
Swamp/Jungle: 0.5EU/t
Grasslands (lots of open space): 1.5EU/t
Deserts: 2EU/t
Other: 1EU/t
Watermills:
Swamp: 0.4EU/t
River Biomes (It is a Biome, must be between level 56-64, limit per chunk?): 1(or 2)EU/t.
Windmills (multiplier on current value):
Desert/Grassland: 1.8
Jungle/Forest: 0.6
Extreme Hills: 2.4
Finally I think some type of Geothermal active 'fault lines' would be cool...