Interesting; this is what this organization thinks about global warming;
Global warming is one of the most serious challenges facing us today. To protect the health and economic well-being of current and future generations, we must reduce our emissions of heat-trapping gases by using the technology, know-how, and practical solutions already at our disposal.
In calling itself; Union of Concerned Scientists it is glorifying its sub-title of Citizens and Scientists for Environmental Solutions. In other words; just another bunch of pansyassed treehuggers.
The fact that we already have, and have used, non-nuclear bunker busters that penetrate much deeper into the ground gives me rise to discount what this organization is stating.
The Guided Bomb Unit-28 (GBU-28) bomb is designed to penetrate hardened targets before exploding, capable of penetrating 100 feet of earth or 20 feet of concrete. The GBU-28 was initially developed in 1991 for penetrating hardened Iraqi command centers located deep underground. This "bunker buster" was required for special targets during the Desert Storm conflict and was designed, fabricated and loaded in record time.