Many people are questioning the difference between REDD and REDD+, here is the ultimate answer to them:
 

REDD [1] stands for:

Reducing Emissions from Deforestation and forest Degradation

REDD+ or REDD plus or REDD-plus: [2]

extends REDD by

• Sustainable Forest Management [3]
   
• Conservation of Forests [4]
   
• Enhancement of carbon sinks [5]

REDD++: Extends REDD+ by

• Low-carbon but high biodiversity [6] lands

Besides REDD or REDD+ or REDD++ you may be interested in retrieving more background knowldege in:

• Is conservation the [7]main deal of REDD+? [7]

• Is illegal logging the main reason of deforestation? [8]
  • What are the real drivers of deforestation? [9]
     
  • Agriculture is the real driver of deforestation... [10]
     
  • How is the EU combating deforestation? [11]
     
• FLEGT, EU-ETR and VPA's - will that really stop illegal logging? [12]
   
• FLEGT - a critical analyes... [13]
   
• How about impact of sustainable forest management (SFM)  in the tropics? [14]