Slaves - including children - make the bricks for Cambodia's housing bubble

Two bedroom apartments in Phnom Penh start at $260,000 -- equivalent to 2,000 years' worth of average annual wages for Cambodia's workers.

But the bricks being used to construct housing in Cambodia's capital are made by people for whom apartments are even more out-of-reach than the average worker: these "blood bricks" are made by indentured slaves (including children), mostly small farmers who got into debt when climate change wrecked their crops and took on consolidation loans in exchange for years of "bonded labor" from brick companies.

The lenders prefer to indenture workers with families: the families can be held as hostages when the borrowers leave their job sites for medical care or other necessities.

Though Cambodia has a fast-growing economy, the fruits of that growth are mostly in the hands of a tiny elite, backed by an autocratic dictator who has mastered the use of Facebook to suppress his opposition by pushing out pro-elite propaganda and exploiting Facebook's "real names" policy to get pseudonymous opponents exiled from the service, and kidnapping and torturing opposition figures who use their real names.

The scope of blood bricks slavery is documented in a new report from Royal Holloway researchers.

Workers reported "respiratory illnesses driven by the inhalation of kiln fumes and brick dust without protective equipment, and limb amputation resulting from unsafe brick-moulding machinery".

When bonded labourers need to seek medical treatment or for other reasons, they must leave without their families to ensure they return, said the report, which was backed by the British government and the Economic and Social Research Council.