A few take-home points from the article:

• The broccoli-sprout beverage also increased the levels of the lung irritant acrolein, another common air pollutant, in the subjects' urine.
• The beverage had the equivalent to about 1.5 cups of broccoli.
• Article suggests sulforaphanes are higher in broccoli sprouts than broccoli.
• Reddit comment tied to the article states that 100g of broccoli only has 171mg of sulforaphanes, whereas the same amount of sprouts has about 1,153mg.
• Study participants that drink the beverage had a 61% increase in benzene excretion.

Rapid and Sustainable Detoxication of Airborne Pollutants by Broccoli Sprout Beverage: Results of a Randomized Clinical Trial in China. (PubMed Abstract)