For example, food vendors in the main Olympic Park will use compostable packaging made mainly from starch and cellulose-based bio-plastics.

FORBES: London's Olympics Go For Environmental Gold

The tax also applies to bags made from paper, plant-based material, or natural starch.

BBC: Northern Ireland's new five-pence carrier bag tax

Beans are one of the healthiest starch options, as they are very good sources of fiber, contain healthy plant-based protein and are packed with nutrients and anti-oxidants.

CNN: Which starches are beneficial? Which should I avoid?