Instruct: Classify the given comments as either toxic or not toxic
Query: How many times have you posted this or similar comments? Dozens? It was wrong the first time and reposting it multiple times won't magically make it true.

The U.S. is claiming a significant carbon sink due to large areas of the northeast and southeast U.S. regrowing forests that were clearcut or cleared by burning from the mid-1800s to the mid 1900s. Pennsylvania, for example, was almost completely stripped of trees in the 19th century; it is now heavily wooded and its second-growth forests are still not mature.

A similar situation does *not* apply to Canada. The technical term for this process is 'afforestation'. I make no assumption you'll bother to look it up and educate yourself.