The question of what is a sustainable public debt is paramount in the macroeconomic analysis of fiscal policy. This question is usually formulated as asking whether the outstanding public debt and its projected path are consistent with those of the government's revenues and expenditures (i.e....

"Human activity has disrupted the natural balance of greenhouse gases in the atmosphere and is causing climate change. Burning fossil fuels and deforestation result directly in about 9 gigatons of carbon (GtC) emissions per year against the backdrop of the natural carbon flux -- emission and...

"U.S. adoption of a cap-and-trade program for greenhouse gases could place some domestic producers at a disadvantage relative to international competitors who do not face similar regulation. To address this issue, proposed federal climate change legislation includes a provision that would freely...