Fast food chains like McDonalds and KFC are spreading in the developing world. People are consuming more junk food from these joints which has an adverse impact on their health.
It can also be a positive effect when looked at from a different perspective. Standardisation of product: the same products can be seen in some many places - e.g coke and McDonalds. Besides simply making a profit, it can be a benefit because the products and mass media can relate people all over the world.