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by Cogito 5111 days ago
From https://developers.google.com/+/plugins/+1button/

+1 tag attributes

These parameters control settings for each button. You can set these parameters as attribute=value pairs on +1 button tags, or as JavaScript key:value pairs in a call to gapi.plusone.render.

option: recommendations

- can be: true, false

- defaults to: true

- description: To disable showing recommendations within the +1 hover bubble, set recommendations to false.