Two other little gems I found while perusing Greenfaith.org related specifically to Halacha and the environment.
The first is from Rabbi Lawrence Troster, who serves as scholar-in-residence at Greenfaith.org, where he lists “Ten Jewish Teachings on Judaism and the Environment.” The piece offers a rationale not unrelated to the one Jonathan Helfand offers, but it has the virtue of being written for a wider audience. I would recommend it as a first step, then go to Helfand for greater exposition.
The second is a list of Jewish statements on the environment that covers a wide spectrum of belief and practice. A perusal of the sources makes it clear that despite the intramural arguments that make up a core part of Jewish theological debate, there is significant agreement on the core principles.
Both are great reads, and Greenfaith.org is a superb starting point for those genuinely interested in probing the degree to which people are discovering that faiths to which faith advocates the despoilment of the environment.