Today nuclear fusion is not controlled at industry scale.
The processes of fission, fusion and fission-fusion-fishion all release energy. Currently, only fission reactors are used to produce electricity.
It depends on what fuel or power is used to generate the electricity .
It is nuclear fission
Coal is still primarily used in the US to generate power (~47% of all electricity generated), however natural gas is being used increasingly to generate electricity (~20% of all electrical generation).
Nuclear fission
Piezoelectric crystals generate electrical energy when bent or squeezed, so yes, it's possible.
It can be used to generate power but it is very dangerous yet little nuclear energy can generate ALOT of power.
Sure. You can harness the power of falling water to drive turbines and generate electricity. You can't, however, get power from cold fusion or burn water in your gas tank.
To generate clocks and to generate power
The idea of inertial confinement is used in fusionexperiments in an attempt to generate energy from nuclear fusion. We don't see it associated with fission. In the fusion method of power generation, high power lasers force protons (hydrogen nuclei) together and add energy to the mix to initiate a fusion reaction.
We do not yet have the ability to contain a controlled nuclear fusion reaction on the scale needed to generate power. Barring some stupendous advance in technology, we probably won't have the ability for 50 to 100 years. We are working on it, though.
Thermal energy is produced in the fuel by nuclear fissions.