Original sentence: Humans have always had a desire to know which horse (or horses) could move the fastest,    horse-racing has ancient roots.Many animal welfare organizations such as the American Society for the Prevention of Cruelty to Animals, the Humane Society of the United States, and People for the Ethical Treatment of Animals, denounce all horse sports due to the high number of horses that are injured and die, and due to the general corruption of this "industry.Today, several categories of racing exist:
Edited sentence: " It is noteworthy that in recent years, horse racing's popularity has been declining due to campaigns by these organizations to make the public aware of some of the cruel practices that so many use in the horse racing industry.Forms of horse racing:.Many animal welfare organizations such as the American Society for the Prevention of Cruelty to Animals, the Humane Society of the United States, and People for the Ethical Treatment of Animals, denounce horse racing due to the high number of horses that are injured and die on race tracks, and due to the general corruption of this "industry.PETA horse racing factsheet