China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.
Italian sonnets have 14 lines and are written in iambic pentameter. They are divided into two sections: the octave and the sestet. The octave of an Italian sonnet consists of the first eight lines of the poem. It follows an ABBAABBA rhyme pattern.