there's loadsa reasons why europeans put tobacco in with the weed, you onli need a small amount of THC to get you high, why roll a spliff with more weed than you need to?

The tobacco also makes the spliff last longer, i always put tobacco in with mine, and they usuly last about 5mins. I've smoked spliffs with just weed in them and they taste harsher and last no where near as long

i'm into slowboats at the moment, makes it last even longer