D Smith wrote:

Pleased tell me what "part" you accept as being from human activity.
1%? 10%? 50%, 90%? 99%?


"Accept" is not a scientific notion, it is a religious one. You might "accept" the teaching
of Jesus, Buddah, or Al Gore, but science is expected to *demonstrate* its findings such that
they can be *verified* by other specialists in the field in an open and transparent way.
Science does not depend on "consensus" or "acceptance". In fact, it is actually rooted in
*falsification* (at least in principle). So, when you ask questions like the one posed above,
you expose your position as being essentially mystical, not scientific.

I do not "accept" your line of argument. I await scientific confirmation and demonstration
which has yet to happen at anything near the breathtaking levels of confidence that
the rectal parasites like Gore trumpet...