"What would happen if they all released their energy at once?"
The energy is usually released in the form of heat and light.
And energy is released when they are put back together.
It did not say how much energy had been released.
Rather, the energy is released to the environment in the form of heat.
It can also be done on purpose, to release energy.
The energy in the water is released when it comes into contact with air.
It may be that the amount of energy released was different than today.
The agency gave few details and did not say how much energy had been released.
As a result, the energy is released to the environment making the temperature go up.