How Green is Judaism?

(26) And God said, “Let us make man in our image, after our likeness. They shall rule the fish of the sea, the birds of the sky, the cattle, the whole earth, and all the creeping things that creep on earth.” (27) And God created man in His image, in the image of God, God created him; male and female God created them. (28) God blessed them and God said to them, “Be fertile and increase, fill the earth and master it; and rule the fish of the sea, the birds of the sky, and all the living things that creep on earth.”

Rabbi Yochanan ben Shimon began, "'After the Eternal your God shall you walk' (Deuteronomy 13:5). But is it possible for a man of flesh and blood to walk after the Holy Blessed One, the One about Whom it is written (Psalms 77:20), 'Your way is in the sea and Your path is in many waters?' And you say, 'After the Eternal shall you walk?' 'And to God shall you cling.' But is it possible for flesh and blood to go up to the Heavens and to cling to the Divine Presence, about Whom it is written (Deuteronomy 4:24), 'As the Lord, your God, is a consuming Fire,' and it is written (Daniel 7:9), 'His throne is sparks of fire,' and it is written (Daniel 7:10), 'A river of fire pulses and goes out before Him.' And you say, 'And to Him shall you cling?' But rather, the Holy One, blessed be He, from the very beginning of the creation of the world, only occupied Himself with plantation first. Hence it is written (Genesis 2:8), 'And the Lord God planted a garden in Eden.' You also, when you enter into the land, only occupy yourselves with plantation first. Hence it is written, 'When you shall come to the land.'"

(19) 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 trees of the field human to withdraw before you into the besieged city? (20) Only trees that you know do not yield food may be destroyed; you may cut them down for constructing siegeworks against the city that is waging war on you, until it has been reduced.

(2) The root of this commandment is known - it is in order to teach our souls to love good and purpose and to cling to it. And through this, good clings to us and we will distance [ourselves] from all bad and destructive things. And this is the way of the pious and people of [proper] action - they love peace and are happy for the good of the creatures and bring them close to Torah, and they do not destroy even a grain of mustard in the world. And they are distressed by all loss and destruction that they see; and if they can prevent it, they will prevent any destruction with all of their strength. But not so are the wicked - the brothers of the destructive spirits. They rejoice in the destruction of the world, and they destroy themselves - [since] in the way that a person measures, so is he measured; which is to say that he clings to it forever, as the matter that is written (Proverbs 17:5), "the one who rejoices in calamity, will not be cleared (of evil)." And the one who desires the good and rejoices in it, 'his soul will dwell in the good' forever. This is known and famous.

One who covers an oil lamp [causing the flame to burn inefficiently] or uncovers a kerosene lamp [allowing the fuel to evaporate faster] violates the prohibition of bal tashchit.

One day, he [Honi] was walking along the road when he saw a certain man planting a carob tree. Ḥoni said to him: This tree, after how many years will it bear fruit? The man said to him: It will not produce fruit until seventy years have passed. Ḥoni said to him: Is it obvious to you that you will live seventy years, that you expect to benefit from this tree? He said to him: That man himself found a world full of carob trees. Just as my ancestors planted for me, I too am planting for my descendants. Ḥoni sat and ate bread. Sleep overcame him and he slept. A cliff formed around him, and he disappeared from sight and slept for seventy years. When he awoke, he saw a certain man gathering carobs from that tree. Ḥoni said to him: Are you the one who planted this tree? The man said to him: I am his son’s son. Ḥoni said to him: I can learn from this that I have slept for seventy years, and indeed he saw that his donkey had sired several herds during those many years.