Complex sentence: A kinetic energy hit minimizes the risk of exploding conventional warhead ballistic missiles, and nuclear tipped ballistic missiles will not explode upon a kinetic energy hit, although chemical or biological warheads may disintegrate or explode and pose a risk of contaminating the environment.
Split into simpler sentences: A kinetic energy hit minimizes the risk of exploding conventional warhead ballistic missiles, and nuclear tipped ballistic missiles will not explode upon a kinetic energy hit. A chemical or biological warheads may disintegrate or explode and pose a risk of contaminating the environment.