Combustion generates water. The low temperature on high layers of the atmosphere makes water to freeze, generating that trails.
Spraying with those thin lines that last so many time until they dissipate would be stupid.
Combustion generates water. The low temperature on high layers of the atmosphere makes water to freeze, generating that trails.
Spraying with those thin lines that last so many time until they dissipate would be stupid.
RE: Look up in the sky everyday you will see planes spraying what?