The eco protesters certainly have a much purer cause than the astronouts. By
the same token, doctors have a much purer cause than engineers. Technology
has been used to harm people far more often than medicine has. There is,
sadly, no hipporcratic oath in science.
But, it's worth noting that one of the symbols most often associated with the
environmental causes came from a space craft with an RTG on board. The often
seen symbol of Earth in the void of space came from a mission to the Moon.
The exploration of space is unequivically tied to the understanding of the
Earth's fragile environment. I believe the exploration of space is worth some
risks.
As for the pureness of my heart in these matters. Who can really say. I
definately look forward to gawking at really cool pictures of Saturn.
Aaron