When Anna Maria decided to set up a pizzeria in Calcutta she wanted her venture to have an impact on many lives. She set up a micro-credit scheme aimed at helping Indian women turn buffalo milk into the finest mozzarella, eventually earning enough to own their animals outright and ensure a better future for their families. Simon Parkes checks out one of the caring sides of the pizza industry's thin and crispy coverage of the Earth's crust. Producer Susan Mitchell