Reply #1: There are two ways to do that

[Warpy]

First, end the drug war. Oh, that won't do much to the Taliban, but it will dry up funding for bad guys worldwide, including the drug kings in Afghanistan.

Second, start raising taxes on gas to reflect what it's really costing us to clean up after it and fight wars over it. There is nothing to spur a switch to biodiesel (we'll be growing hemp after the end of the stupid drug war, remember) and other alternatives including fuel cells for power generation like making us pay oil's true cost up front. Raise those taxes slowly enough to allow the technology to develop and go into production.

With fewer petrodollars flooding into countries like Saudi Arabia, there will be far fewer dollars being put into bin Laden's coffers.

Anyone who is serious about ending world terrorism needs to think about how it is funded, and these are the two main sources: oil and black market drugs.