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LIGNITE Brownish coal, softer sibling in carbon’s family tree GEOTHERMAL Harnessing subterranean heat, volcanic whispers for power FISSION Nuclear splitting releasing bound energy from heavy atoms PHOTOVOLTAIC Converts sunlight directly to electricity, often silicon-based COALIFICATION Transforming ancient vegetation into carbon-rich sedimentary fuel PETROLEUM Ancient biogenic liquid, precursor to myriad hydrocarbons BIOMASS Organic material fueling energy cycles beyond fossil epochs SUSTAINABILITY Balancing current energy needs without depleting Earth’s stock HYDROELECTRIC Dammed river’s kinetic energy converted to current FRACTURING High-pressure cracking unlocking trapped shale hydrocarbons WINDMILL Ancient mechanical ancestor to modern aerodynamic energy harvesters TURBINE Rotational device converting fluid flow to mechanical energy RENEWABILITY Characteristic of resources replenished within usable human timescale CELLSOLAR Basic unit capturing photons, simpler form of photovoltaic device ALTERNATOR Converts mechanical rotation into alternating electrical current
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Energetic Paradox: Fossil Fuel to Photovoltaic
Challenging puzzle for experienced crossword solvers
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Across
1.
Transforming ancient vegetation into carbon-rich sedimentary fuel
2.
Converts sunlight directly to electricity, often silicon-based
5.
Characteristic of resources replenished within usable human timescale
6.
Basic unit capturing photons, simpler form of photovoltaic device
8.
Ancient biogenic liquid, precursor to myriad hydrocarbons
10.
Converts mechanical rotation into alternating electrical current
12.
Nuclear splitting releasing bound energy from heavy atoms
Down
3.
Balancing current energy needs without depleting Earth’s stock
4.
Dammed river’s kinetic energy converted to current
7.
Harnessing subterranean heat, volcanic whispers for power
9.
Brownish coal, softer sibling in carbon’s family tree
11.
High-pressure cracking unlocking trapped shale hydrocarbons
13.
Ancient mechanical ancestor to modern aerodynamic energy harvesters
14.
Organic material fueling energy cycles beyond fossil epochs
15.
Rotational device converting fluid flow to mechanical energy
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