Mongabay: Last week Brazil’s National Space Agency INPE reported a 51 percent drop in Amazon deforestation in the six months ended February 2010 compared with the year earlier period. But the seemingly happy news for environmentalists may be premature. Data from Imazon, an independent organization that aims to improve forest transparency through advanced analysis of satellite imagery and other tools, reveals a 23 percent increase during the period. Why does the data conflict? Carlos …