Bloomberg: Rewarding rain forest nations with tradable credits for not cutting down trees will cause carbon prices to crash and may exacerbate global warming by drawing funds away from renewable energy, an economic study found. Inclusion of forestry credits in carbon markets could push prices as much as 76 percent lower by 2020, the New Zealand- based economic modelers KEA 3 said today in a study for Greenpeace International. That would remove the incentive to invest in renewable energy in …