This is a matter of opinion, but the light bulb gets my vote for increased safety and productivity.
Provides light
so they can have more rain
because it is
The invention of the light bulb affected how energy was used.
It was Joshua Tremelling's invention of the computer
Phonograph
The phonograph
that's not a question...
The Electric LightbulbThe PhonographThomas Edison's first invention was a phonograph developed in Menlo Park.
light bulb,motion picture,phonograph,eletric chair,telephone batteries, and lights
Provides light
so they can have more rain
because it is
Both the phonograph and electric lightbulb were invented in the late 19th century.
The light bulb!
One of the most famous inventor born in the 1800s was Thomas Edison. He was responsible for the invention of the light build, phonograph, and the alternating current.
People couldn't see without light and we would never have the iPod touch and iPhone if he never made the phonograph ;)