Об­ра­зуй­те от слова MASS од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

When wind and dry soil meet, dust sweeps across the land. This combination happened on a _________________ scale during the 1930s in the United States. From 1931 to 1939 little or no rain fell across the Great Plains. The Dust and erosion created a "Dust Bowl" across more than 50 million acres of farmland in states that included New Mexico, Kansas, Texas, and Oklahoma.