[Dan Evans]

is there a legal way to go back to the old freon foam process or is that forever bared by treaty?

We could always drop out of the treaty, especially since it is based on bogus science.

[Truth29]

We should drop out of the treaty. Both Challenger and Columbia were lost due to "environmental" substitutions of materials that were not as good as what they replaced and failed with catastophic results. Junk science and environmentalism have killed 14 astronauts, and may have killed the manned space program.