 
 <prompt> ```Why we dey use coal tar? Based on the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context:``` <response>: ```Asphalt/bitumen fit sometimes dey confuse with "coal tar", wey be black, thermoplastic material wey dey look alike wey dem dey produce by the destructive distillation of coal. During the early and mid-20th century when town gas dey produce, coal tar dey readily available as byproduct and dem dey use am well well as the binder for road aggregates. The addition of tar to macadam roads make people dey call am tarmac, wey people dey use now now to refer to road-making materials. But, since the 1970s, when natural gas come replace town gas, asphalt/bitumen don completely take over the use of coal tar for these applications. Other examples of this confusion include the La Brea Tar Pits and the Canadian oil sands, wey both of dem actually contain natural bitumen instead of tar. Pitch na another term wey dem sometimes use to refer to asphalt/bitumen, as in Pitch Lake.``` 