What are the most useful tips for finding hidden recipes for energy sources in Little Alchemy 2?

In Little Alchemy 2, finding hidden recipes for energy sources can be both challenging and rewarding. Here are some useful tips and steps to help you discover these hidden combinations:

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1. Understand the Basics of Energy Sources
Energy sources in Little Alchemy 2 are often tied to natural phenomena, technology, or abstract concepts. Some common energy-related elements include:
- Electricity
- Solar
- Wind
- Fire
- Steam
- Nuclear

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2. Experiment with Natural Elements
Many energy sources are derived from natural elements. Try combining these with tools, technology, or other natural phenomena:
- Sun + Solar Cell = Solar Energy
- Wind + Windmill = Wind Energy
- Water + Fire = Steam
- Steam + Turbine = Electricity

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3. Combine Technology with Natural Elements
Energy sources often involve combining natural elements with technological components:
- Sun + Solar Panel = Solar Energy
- Wind + Turbine = Wind Energy
- Fire + Boiler = Steam
- Steam + Engine = Steam Engine

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4. Explore Abstract Concepts
Some energy sources are tied to abstract or advanced concepts. Experiment with these:
- Electricity + Time = Energy
- Energy + Sun = Solar Energy
- Energy + Wind = Wind Energy
- Energy + Atom = Nuclear Energy

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5. Use the "Hint" System
If you're stuck, use the in-game hint system to get clues about possible combinations. This can help you uncover hidden recipes for energy sources.

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6. Think Outside the Box
Some energy sources are less obvious and require creative thinking. For example:
- Life + Electricity = Energy
- Fire + Air = Energy
- Earth + Fire = Lava (which can lead to geothermal energy concepts)

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7. Check for Updates
The developers occasionally add new elements and recipes. Make sure your game is updated to access the latest content.

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8. Use Online Resources (Sparingly)
If you're truly stuck, consult a reliable Little Alchemy 2 guide or database for specific combinations. However, try to experiment on your own first to maintain the fun of discovery.

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Example Hidden Energy Recipes:
- Sun + Solar Panel = Solar Energy
- Wind + Turbine = Wind Energy
- Fire + Boiler = Steam
- Steam + Engine = Steam Engine
- Electricity + Time = Energy

By following these tips and experimenting with combinations, you'll uncover hidden energy sources and expand your element collection in Little Alchemy 2!