D'var Torah
Bal Tashchit: the development of a Jewish environmental principle
One can see the development of a Jewish environmental ethic by tracing the principle of Bal Tashchit, do not destroy or waste, from its biblical origin through later rabbinic interpretation in the following 5 texts.
1) When, in your war against a city, you have to besiege it a long time in order to capture it, you must not destroy its trees, wielding the ax against them. You may eat of them, but you must not cut them down. Are the trees of the field human to withdraw before you into the besieged city? Only trees that you know do not yield food may be destroyed. (Deut. 20:19-20)
2) Whoever breaks vessels, or tears garments, or destroys a building, or clogs a well, or does away with food in a destructive manner violates the negative mitzvah of bal tashchit (Rambam, Hilkhot Melakhim 6:10)
[Talmudic rulings on bal tashchit also prohibit the killing of animals for convenience (Hullin 7b), wasting fuel (Shabbat 67b), and a minority opinion classifies the eating of extravagant foods when one can eat simpler ones as a violation of this precept (Shabbat 140b).]
3) One should be trained not to be destructive. When you bury a person, do not waste garments by burying them in the grave. It is better to give them to the poor than to cast them to worms and moths. Anyone who buries the dead in an expensive garment violates bal tashchit. (Maimonides, Mishneh Torah, Mourning 14:24)
4) The purpose of bal tashchit is to teach us to love that which is good and worthwhile and to cling to it, so that good becomes a part of us and we will avoid all that is evil and destructive. This is the way of the righteous and those who improve society, who love peace and rejoice in the good in people and bring them close to Torah: that nothing, not even a grain of mustard, should be lost to the world, that they should regret any loss or destruction that they see, and if possible they will prevent any destruction that they can. Not so are the wicked, who are like demons, who rejoice in destruction of the world, and they are destroying themselves. (Sefer Ha-Hinukh, #529)
5) Yea, "Do not destroy anything" is the first and most general call of God... If you should now raise your hand to play a childish game, to indulge in senseless rage, wishing to destroy that which you should only use, wishing to exterminate that which you should only exploit, if you should regard the beings beneath you as objects without rights, not perceiving God Who created them, and therefore desire that they feel the might of your presumptuous mood, instead of using them only as the means of wise human activity -- then God's call proclaims to you, "Do not destroy anything! Be a mentsh! Only if you use the things around you for wise human purposes, sanctified by the word of My teaching, only then are you a mentsh and have the right over them which I have given you as a human. However, if you destroy, if you ruin, at that moment you are not a human but an animal and have no right to the things around you. I lent them to you for wise use only; never forget that I lent them to you. As soon as you use them unwisely, be it the greatest or the smallest, you commit treachery against My world, you commit murder and robbery against My property, you sin against Me!" This is what God calls unto you, and with this call does God represent the greatest and the smallest against you and grants the smallest as also the greatest a right against your presumptuousness.... In truth, there is no one nearer to idolatry than one who can disregard the fact that things are the creatures and property of God, and who presumes also to have the right, having the might, to destroy them according to a presumptuous act of will. Yes, that one is already serving the most powerful idols -- anger, pride, and above all ego, which in its passion regards itself as the master of things. (Rabbi Samson Raphael Hirsch, Horeb, #56)