BB	Evans, Virginia, Dooley, Jenny, Blum, Ellen (2014): Environmental Science. Newbury: Express Publishing
BC	Eastwood, John. Oxford practice grammar: intermediate: with answers. [s.l.]: Oxford University Press, 2019
BC	Hickman, Leo. Will Jellyfish Rule The World?: A Book about Climate Change. [S.l.]: Puffin, 2009.
BC	VINCE, M. Intermediate language practice : English Grammar and vocabulary. With key. New ed. [s. l.]: Macmillan Heinemann, 2003. ISBN 1405007680.

LISTADO DE URLs:
	Cambridge Dictionary Online [https://dictionary.cambridge.org/es]
	Linguee [https://www.linguee.es/]
	Wordreference [https://www.wordreference.com/]