A new poll out by Harris Interactive finds that more U.S. adults feel comfortable sharing personal information with Amazon.com and Google than they do with Facebook. According the study, just a third of survey respondents said they are comfortable with how Facebook handles personal information related to the delivery of ads.

That compares to 66 percent who are comfortable with how Amazon.com uses personal shopping history to recommend products, and 41 percent who are comfortable with how Google uses information from past searches.

No one beat out grocery stores in terms of trustworthiness, with 81 percent of respondents saying they were comfortable with how grocery stores used personal information for coupons.

The study was conducted with 2,262 US adults.

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