more biology question help?

[Claire K]

Fill in the blank.

1. _________ _____________ energy instead of animal energy is used to drive farm machines.

2.The detonations from a nuclear arsenal would create a ________ __________, in which a huge dark cloud of soot and smoke would block out the sun.

[emucompboy]

1. fossil fuel
2. "nuclear winter"

[lolwtfpwnt92]

kinetic energy

2...im not entirely sure, but im pretty confident its mushroom cloud.