Cleaning Up Text Pasted from the Web
http://word.mvps.org/FAQs/Formatting/CleanWebText.htm

Barnhill, Suzanne and Dave Rado
Word MVP Site, The
2005

Abstract:

The ease of copying and pasting text from Web sites and email greatly simplifies many tasks in Word, but problems often arise in making the pasted text conform to the style of the document into which it is pasted. One of the most common chores is getting rid of excess line breaks, which cause the text to wrap short of the right margin. There are several ways to work around this problem.