New Zealand Herald: There is one reason I would like to believe climate change is a serious problem. Native trees. If ever we see a global market in carbon dioxide it will be a bonanza for trees that grow too slowly to be a commercial milling proposition. The Maori Party’s deal with National this week was a taste of what could happen. Shameless special pleading it may have been, but it means iwi owning pine plantations can earn carbon credits by planting permanent forests on Crown land as compensation …