It is correct and usable in written English.
You can use it to refer to an attempt made by someone. For example, "We thank the volunteers for their tireless efforts on the efforts to clean up the coast."
Hazlitt comments on the efforts of several actors in playing the role, particularly Kean.
But that reputation rests largely on the efforts of one or two companies, such as Infosys, which are impeccably run.
Set in a nursing home, it focuses on the efforts of one resident to come to grips with his past.
Nothing depends either on one's own efforts or on the efforts of others.
America has been built on the efforts of immigrants.
The Welsh success was built on the efforts of its forwards.
In Denver, many were anxiously seeking out news updates on the efforts to contain the oil.
Recycling programmes require community buy in and rely on the efforts of individual householders.
"It also impacts on the efforts of all other Hyundai A-League clubs and their owners.
If Britain are to succeed this week, much will depend on the efforts of Konta.
In trying to cripple CCR5, Cannon is building on the efforts of many others.
