CHICAGO (Reuters) – Why are food prices rising? Global food prices started to rise in mid-2020 when businesses shut down due to the COVID-19 pandemic, straining supply chains. Farmers dumped out milk and let fruits and vegetables rot due to a lack of available truckers to transport goods to supermarkets, where prices spiked as consumers stockpiled food. A shortage of migrant labor as lockdowns restricted movement impacted crops worldwide. Since then, there have been problems with key crops in many parts of the world. Brazil, the world’s top soybean exporter, suffered from severe drought in 202…