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Environmental scientists have 
 news that 
 of the Amazon are emitting more carbon dioxide than they are absorbing. The rainforest is 
 producing over a billion tons of CO2 a year. The Amazon used to be a carbon "sink" where CO2 was sucked up and converted into 
. It has now become a 
 of carbon dioxide. The biggest reasons for this 
 from sink to source are 
, deforestation and forest 
. The Amazon is losing its nickname of being the 
 of the world. Researchers predict the rainforest will create CO2 at an accelerating rate in the 
.