Figure 2
From: Carbon benefits from protected areas in the conterminous United States
a) Difference in net forest area loss rates between protected and unprotected forestlands: calculated as Rateprotected - Rateunprotected based on the numbers shown in Table1 for each state. In general, the larger the difference the greater the reduction in forest area loss due to the adoption of protected areas; b) Difference in afforestation rates between protected and unprotected forestlands: calculated as AffRateprotected - AffRateunprotected for each state (data not shown). Positive numbers indicate the afforestation rate in protected areas was greater than the corresponding rate in unprotected areas for a given state, and the negative numbers suggest the opposite; and c) Regional division used for summary.