Re: A reduction in power consumption or in the power consumption?
Originally Posted by Snappy
"This machine incorporates energy-saving parts that ensure a great reduction in power consumption."
The energy-saving parts reduces the power consumption of this machine.
Each of these sentences uses the definite article the correctly. It's not necessary in the first sentence because you have used the indefinite article a to refer to something for the first time (a great reduction). In the second sentence, you do need to change the verb to reduce to agree with the subject parts, but otherwise it's 100% correct. The is required in this sentence, because you are referring to a specific thing.