In honor of Earth Day, here is an excerpt from an 1860 sermon by Brigham Young. I’m intrigued by how his counsel to cultivate the earth figures into his eschatology.
It is the privilege of the Saints to enjoy every good thing, for the earth and its fulness belong to the Lord, and he has promised all to his faithful Saints; but it must be enjoyed without the spirit of covetousness and selfishness-without the spirit of lust, and in the spirit of the Gospel: then the sun will shine sweetly upon us; each day will be filled with delight, and all things will be filled with beauty, giving joy, pleasure, and rest to the Saints. The vegetable kingdom is made for man, to gratify the taste and add health to the body and gratification to every sense. The gold and the silver will be given to the Saints, the riches of the world will be put in their possession, and they will be legal heirs. We are now passing through a day of trial, to determine whether we will prove worthy of all we may enjoy and possess, for it must be enjoyed and possessed without the spirit of covetousness. Without the pure Spirit of the Lord Jesus Christ, we cannot enjoy the good things of life. . . .
Brethren and sisters, I wish you to continue in your ways of welldoing; I desire that your minds may be opened more and more to see and understand things as they are. This earth, in its present condition and situation, is not a fit habitation for the sanctified; but it abides the law of its creation, has been baptized with water, will be baptized by fire and the Holy Ghost, and by-and-by will be prepared for the faithful to dwell upon.
Shall we not strive to prepare ourselves as much as possible for the coming of the Son of Man? The Savior will dictate his kingdom, through his Apostles and Prophets, until all the heathen nations are virtually redeemed by the ordinances that effect redemption, that they may inherit the kingdom that is prepared for them. This work must progress. This earth must become a paradise-must be purged of the sin that has been upon it for many generations, for all sin and iniquity must be swept from it, and a people be prepared for the coming of the Son of Man. He will prepare a people long before the earth is celestialized and prepared for the presence of God. The Saints will increase, the Spirit of wisdom and knowledge will increase, and every grace of the Spirit of the Lord Jesus Christ must increase upon the earth, until a people and place are so prepared that the Savior can come and finish the work given him to do, when he will present the kingdom to the Father.
There is a great work for the Saints to do. Progress, and improve upon, and make beautiful everything around you. Cultivate the earth and cultivate your minds. Build cities, adorn your habitations, make gardens, orchards, and vineyards, and render the earth so pleasant that when you look upon your labors you may do so with pleasure, and that angels may delight to come and visit your beautiful locations. In the meantime, continually seek to adorn your minds with all the graces of the Spirit of Christ. 
 Brigham Young, “Religion, Progress, and Privileges of the Saints, &c.,” Journal of Discourses 8:83.