How to make smog in Little Alchemy

To make smog in Little Alchemy you have to combine this elements:

1. city + fog
2. fog + smoke

Smog Step by Step

How do I combine the necessary elements to create smog in Little Alchemy?
Here we show you the walkthrough, just follow the steps below:

1 fire + water = steam

2 earth + water = mud

3 air + steam = cloud

4 fire + mud = brick

5 cloud + earth = fog

6 brick + brick = wall

7 wall + wall = house

8 house + house = village

9 village + village = city

10 city + fog = smog

Below you can see a video tutorial on how to make smog in Little Alchemy:

Combinations with other elements are not yet known.