There are a a number of manufacturers/suppliers that do "eco" stuff, though some will argue that they not really eco - but if you concerned about your health they worth a good look.
As a very good general pre spray you could try Nemesis from Restormate, Newcastle Upon Tyne
or M-Power from Solutions Cornwall.
I use both of those to good effect.
Solutions Cornwall do a good range of other eco products too, as do Prochem, Chemspec and others. Someone else will fill in with details.