Niebla is a noun. Nublado is an adjective.

Question

There is an error above.

Inma Sánchez · Accepted Answer

Hola C
Can you be more specific please? I can't see any error. In Spanish the word "niebla" is a noun and the word "nublado" is an adjective. 
The sentence might change in English, for example:
It is foggy. (foggy is an adjective in English) but
Hay niebla. (niebla is a noun in Spanish (literally "fog", not foggy)
The way we express this sentence in English and Spanish are different. We, in Spanish, literally say "There is fog" (Hay = there is, niebla= fog) but you say this same thing with "It's foggy".  
Is this what is confusing you?
Saludos
Inma

Calum Graham · Answer

Ignore this. It has been addressed.How is there an error?"Bear in mind that hay will be followed by a noun (a noun in Spanish)"