You are given a sentence and your task is to generate another sentence that supports the given input.
One example: In spite of this reduced heat input, the surface temperature of Venus is higher than that of the Earth.
Solution is here: Venus has a warmer average surface temperature than earth.
Explanation: Output statement supports the input statement's claim about the temperatures of Venus being higher than the earth.

Now, solve this: Gamma radiation is generated by radioactivity, the decay of radioactive (unstable) atoms both in Earth's crust and in the atmosphere, and in reactions caused by cosmic ray collisions with atmospheric constituents, as well as by the decay of elementary particles produced by these collisions.
Solution:
Radioactive atoms, nuclear explosions, and stars produce gamma rays