Fatbergs are a national problem, but they can be avoided.

AWWA and WEF recently teamed up to create a new children's activity - Pipe Up! - a series of puzzles to help children learn various aspects of water services and the value they bring to our everyday lives.

There is a 'fatberg' wreaking havoc in London - "one of the largest to form in the London sewer system", according to NPR, and "weighing roughly the same as 11 double-decker buses".