Long-time vegan Anderson explained: "Rivers are siphoned off, not just for the animals but also for crops grown to feed animals on factory farms.
"Producing one pound of beef uses as much water as about six months of showers."
The spoof images were shot by renowned photographer David LaChapelle.
The former Baywatch star could also be set to star in fashion campaigns after she was signed to prestigious modelling agency Next Model Management earlier this year.
Although she is widely thought of as one of the sexiest women of all time, Anderson confessed she thinks the idea of being cast on her looks alone is laughable.
She explained: "I've just signed with Next Modelling agency for commercials and appearances. That is funny. I've never felt pretty enough to be a model. I think I've provoked feelings with how I look. But not as a beauty but as a mischievous little rascal!"
- Bang! Showbiz