If you're concerned about the ethics of livestock production but don't want to become a vegetarian, consider this: It may be possible to grow meat in a petri dish.

Dr. Mark Post, professor of vascular physiology at the University of Maastricht in the Netherlands, is working on creating meat from bovine stem cells. And he's planning to unveil a burger created this way in October, he said Sunday at the annual meeting of the American Association for the Advancement of Science in Vancouver.

Croplands and pastures occupy about 35% of the planet's ice-free land surface, according to a 2007 study in Proceedings of the National Academy of Science.

"Meat consumption is going to double in the next 40 years or so, so we need to come up with alternatives to solve the land issue," Post said.

Read - One stem cell burger: $330,000