With tiny leaf-like fronds, and the smallest flower and fruit in the plant world, duckweed may sound like delicate botanic specimen. However, this bright green denizen of ponds across Asia teams ...

Duckweed, a protein-rich water plant, has been described as a "miracle plant" as it is one of the fastest growing on the planet. There are around 500,000 dairy cows in Wales which excrete about ...