Hypergolics are bad. Lots of the high ISP chemicals are things you just don't want to be around. The foam they spray to treat fire risk when things go boom (PFOA) is fat absorbed. We have a huge emerging problem in Australia in land near airports, from the runoff contamination of years of "set a plane alight and practice putting it out" behaviuors.
This virgin-steppe has now been rained on, semi continuously by rockets for years. Sure, at one level we're all aware of radiation hormesis and a small amount of what may kill you is no big deal. I suspect a 50+ year window of scavenging left over propellant tanks, shedding insulation, odd metals, bits, stuff, has not done anyone any favours. In aggregate this will be lost in noise. In point-problem terms in the specific areas, This is basically industrial contamination.
In the west, you probably wouldn't be allowed to build on it un-remediated, and I don't mean because "heavy metal things fall out of the sky on you" -The land itself is now not really a green field any more.
(btw, the lifetime of atlantic coal steam power has left a sea bottom chemtrail which is awesome)
The Russians are replacing the hypergolic fueled Proton with a new kerolox fueled launcher called Angara. Hypergolics are still used in upper stages and in things like RCS thrusters etc.,but the amounts are of course much smaller than in the first stage.
WRT firefighting foams, there are apparently some green (sugar-based IIRC) alternatives that are almost as good as the fluorine based surfactants used today.
For rocket launches the spraying you see is plain water, and it's done for sound suppression, not to get a head start on putting out the fire in case the rocket blows up.
I'm no expert. The pfoa risk to humans is plastics in food prep and storage mainly. Most reports say the traces from pfas foams at airports is an unquantified risk right now. Farms are finding they can't sell produce.
This virgin-steppe has now been rained on, semi continuously by rockets for years. Sure, at one level we're all aware of radiation hormesis and a small amount of what may kill you is no big deal. I suspect a 50+ year window of scavenging left over propellant tanks, shedding insulation, odd metals, bits, stuff, has not done anyone any favours. In aggregate this will be lost in noise. In point-problem terms in the specific areas, This is basically industrial contamination.
In the west, you probably wouldn't be allowed to build on it un-remediated, and I don't mean because "heavy metal things fall out of the sky on you" -The land itself is now not really a green field any more.
(btw, the lifetime of atlantic coal steam power has left a sea bottom chemtrail which is awesome)
Babushka used to have one head, now has two...