id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
f1881j94n03	John M Holmes	Sustainable Energy Development	2010		.txt	text/plain	132	9	48	Then, taking these constraints into account, we develop a basic model of energy production with varying levels of pollution in discrete time. Hence, we pose the problem in continuous time, which yields an analogous system of differential equations.	cache/f1881j94n03.txt	txt/f1881j94n03.txt