ClimateWire: For Rep. Edward Markey (D-Mass.), it is “cap and invest.” National Aeronautics and Space Administration climatologist James Hansen says it is “tax and trade.” Then there are “cap and cash back” and “cap and dividend,” mottoes promoted by environmental investing expert Peter Barnes to describe proposals to cap greenhouse gases, often called “cap and trade.” Language even popped up in February as a jurisdiction issue in Congress, when Rep. James Sensenbrenner (R-Wis.) and four …