FT, can you help me understand the practical significance of different internal carbon prices?

Sir, Pilita Clark reports that Spain’s Inditex fashion group, owner of the Zara brand, says it has a US$30 a ton internal carbon price even though EU benchmark carbon process are around $US9. “Companies accelerate carbon pricing” September 21.

I have no idea whether those prices are high or low so it would be interesting reading what Zara will not be doing with a price of US$30 compared to what it would be doing if the price was $US9.

I ask, because when I announced to my family we will from now on be using an internal carbon price of $US60, twice that of Zara’s, my kids were properly impressed, “Way to go dad!" But then they came back and asked me what that meant for them… and I don’t have a clue… and I hope I don’t have to scrap my outdoor grill now either. 

@PerKurowski