Bopha should be in school but instead toils seven days a week in a searing brick kiln on the outskirts of Phnom Penh – a 14-year-old trapped in debt bondage in a boom industry preying on the poverty of Cambodia's farmers.Unpredictable weather linked to climate change is laying waste to Cambodian fields.Saddled with debt from failed harvests, tens of thousands of farmers are turning to brick factories, where owners pay off their bills in exchange for labour.The factories feed a surging co