> 1920 is a convenient date since peak deforestation was in the 1910’s. You can only go up from rock bottom, no? Measuring from historic highs will make a posi

> 1920 is a convenient date since peak deforestation was in the 1910’s. You can only go up from rock bottom, no? Measuring from historic highs will make a positive trend look like a negative one. Which is why if you want to work out whether trees are increasing or decreasing you measure from the recent minimum.