job creating. as a source of energy, it's going to create lots of jobs, money invested in solar power creates two to three times more jobs than money invested in coal or natural gas. not 100% reliable. sun goes down or is heavily shaded, solar PV panels stop producing electricity.
Rhyme is basically a repetition of two or more words that sound alike. It is a widely used convention in many songs and different types of poetry like poems and sonnets among others. In a poem for example, the use of rhyme functions to unify the message of the said poem.
The poem also rhymes, and therefore it has a rhyme scheme. In this poem, the rhyme scheme is: AABB. This means that in each four-line stanza, the first two lines rhyme (their rhyming sound is indicated with an A), and the last two lines rhyme (B). These rhyming pairs are called couplets, probably because they are like little verbal couples.