Students turn doggy doodoo into building bricks

Stray dogs - and the mess they make - are causing a stink in the Philippine capital Manila. But one group of eight-graders might have found a new way to clean up their streets. Their advisor says the group's 'bio bricks' - a mixture of dog poop and cement powder - will tackle two problems in one go. (SOUNDBITE) (Filipino/English) SCIENCE ADVISER, MARK ACEBUCHE, SAYING:"Our streets will really be cleaned up because the stray dogs that defecate on the streets, all their manure will be collected an