Note the shift in tone between the first verse and the second.

Bio-materials may be substituted for petrochemical feedstocks as petroleum prices rise.

In deciding whether to double park, a resident of Econville will compare his benefit from double parking to the expected fine.. .Therefore, to achieve optimal deterrence – that is, deterrence only of those double-parking violations in which the benefits are less than the [previously stipulated] $10 congestion cost – it is necessary for the expected fine to equal $10. . .

[…] Lim Peng Siang, Low Kim Pong, Teo Sian Keng and Lee Choon Guan were leaders of Fukien dialect group; Lam Kim Seng, Chua Tse Yong were Teochew leaders; Loke Yew and Lam Wai Fong were Cantonese leaders.