Nowadays, we hear every day that our earth is becoming more and more polluted and that a day will come that our life on this planet will be no longer possible. This is undoubtedly the result of our negligence toward the blessing that God had granted us, the blessing of nature and a clean environment: “It is He who created for you all that is in the earth…” (2:29). We are responsible for whatever is going on in our surroundings and at the same time dependent upon it to be able to live.

It is important to note that at the time of the emergence of Islam, people did not face such complex environmental issues and thus this matter has not been dealt with in depth in Islam. Nevertheless, Islam has emphasized the significance of preserving the environment and provided us with guidelines that help us find solutions for such complexities through the narrations and actions of Prophet Muhammad (PBUH&HP) as well as the twelve infallible leaders (AS). This article is an attempt to summarize these matters for you briefly.

Why should we preserve the environment?

The answer is quite simple, and it reveals the direct correlation between human beings and their surroundings. Preserving the environment equals our own physical and mental wellbeing. Our immediate surrounding is where we are always in touch with, and its quality will inevitably affect our mind and soul. Moreover, we are the ones who make use of the environment to fulfill our needs, and the way we use it will ultimately determine our condition of life.

On the other hand, Allah has made this world in perfect equilibrium and human’s excessive exploitation of natural resources will result in damaging this balance: “And We spread out the earth and cast in it firm mountains, and We grew in it every kind of balanced thing” (15:19). When the balance is disturbed, the result will be the many environmental crises that we are faced with nowadays. These include pollution, global warming, natural resource depletion, waste disposal, climate change, loss of biodiversity, deforestation, ocean acidification, ozone layer depletion, acid rain, water pollution, etc. [1].

How Can We Preserve the Environment?

The problems mentioned above are the result of our irresponsibility toward the blessing of the environment, and this is we that should compensate for it. What follows are some Islamic guidelines for us to observe in our treatment of the environment:

1. Avoid Wastefulness

When you make excessive use of natural resources such as water or what is produced by water such as electricity, the paper that is made through cutting trees, fossil fuels, etc., you put the environment in danger and threaten its durability. Quran also emphasizes the necessity to be moderate in using God’s blessings in this world: “… Eat and drink, but do not waste; indeed, He does not like the wasteful” (7:31).

Moreover, our environment is not restricted to our use only but is a public possession from which every human being has the right to benefit. Therefore, we should be careful not to violate other people’s rights in having a share in the environment through our extravagant exploitation of its resources.

There is a general rule in Islam that bids Muslims not to “cause harm or return harm” [2], meaning that they should act in a way that neither brings inconvenience for others nor undermines their situation. Through wastefulness we bring injustice to both ourselves and other human beings; we consume their share in the environment and damage God’s blessing that was given to us to sustain our livelihood. So, respect yourself as well as your fellow human beings through respecting your surroundings. 

2. Keep your Environment Clean

Think about the environment as your home and keep it clean as you like your home to be neat and tidy. Prophet Muhammad (PBUH&HP) says in a narration that: “Allah is pure and likes purity and cleanliness… therefore, keep where you live in clean” [3]. As it was mentioned above, pollution is one of the most pervasive environmental issues in today’s world; this includes air pollution, water pollution, as well as the excessive amount of waste produced on a daily basis.

Those who have faith in Allah and consider His satisfaction in every instance of their lives must be much more cautious regarding their own or their environment’s cleanliness since as Prophet Muhammad (PBUH&HP) puts: “Cleanliness roots in one’s faith” [4].

Air, water, and soil are the three elements that are the source of life on the earth, which has been mentioned in the Quran as well as narrations [i]&[ii]. It is all the matter of your choice. Keep the air you breathe in clean by choosing to take a walk or public transportation instead of using your car. Preserve the water fresh and pure by avoiding throwing waste in the water, urinating in it, and producing waste water excessively; Imam Ali (AS) emphasizes that water has some inhabitants, so we should not harm them through polluting it [6].

Even at the time of war, Prophet Muhammad (PBUH&HP) forbade his soldiers to pollute or poison their adversary’s city [7]. So, let the soil from which your food is provided remain unpolluted by not throwing waste, especially those that do not dissolve in the environment such as plastic waste, etc.

3. Engage in Green Activities

Plant a tree or bring awareness to people about the environment and the natural crisis that is threatening the earth and its inhabitants. There are many narrations from Prophet Muhammad (PBUH&HP) that highlight the necessity of planting trees. For instance, he says: “If a Muslim plants a tree and a bird, human or another creature eats its fruit, it will be considered as an act of charity from him [by Allah]” [8].

Also, Imam Sadiq (AS) considers planting trees and agriculture as the occupations which bring lawful (Halal) earning for the person performing them [9]. When your surrounding is green, your life will become lively and energetic [iii], and you will become more efficient in your performance.

Conclusion:

Finally, it all depends on you and how you want your future to be like. A green and lively environment is the result of our endeavors to preserve it and to give our posterity the opportunity to enjoy the blessing of God. The message of Islam in this matter is again that of moderation and responsibility which guides human beings to live in perfect equilibrium with the environment. 

Notes:
[i] (25:54), (23:12), (24:45), (30:24), (21:30)

[ii] Imam Sadeq (AS) said: “life in a land where is devoid of these three essential factors is highly difficult and challenging: clean air, fresh and plentiful water, as well as fertile ground” [5]. 

[iii] Imam Ali (AS) said: “looking at the green nature causes freshness, liveliness and vitality” [10].

References:

1. Environment
2. Shaikh al-Hur al-Aamili , Wasail Al-shia , vol. 18, p.32
3. Muhammad ibn Hassan Sheibani, Al-Jame Al-Saghir, vol.1, p.267
4. Muhammad Baqir Majlisi ,Bihar al-Anvar, vol.59, p. 291
5. Ibn Shu'ba al-Harrani, Tuhaf al-Ughul, p.320
6. Muhammad ibn Ali Al-Ehsaei, Avali al-Leali, vol.2, p. 187.
7. Mirza Hussain Tabarsi , Mustadrak al-Wasail, vol. 13, p.26.
8. Muhammad ibn Ya'qub al-Kulayni al-Razi , Usul al-Kafi, vol.5, p.260
9. Shaykh as-Saduq,Uyun Akhbar ar-Reza (AS), vol.2, p. 40

All Abrahamic religions believe in the return of the savior, the liberator of the human beings and redeemer, in the End-Time. Prophets and divine messengers have promised the day that the whole universe will be full of justice and tenderness. Other religions also have similar beliefs, although they differ in some minor aspects, which will be discussed below. We go through references from different religions and faiths to examine their views about the last savior. 

Kalki: The Last Savior in Hinduism

In Upanishads, which is a collection of ancient Sanskrit texts that contain some of the central philosophical concepts and ideas of Hinduism, the last savior is called Kalki. He is believed to be the tenth avatar of Hindu god Vishnu in the last of the four stages in the endless cycle of existence known as "Samsara," which is defined "as the endless cycle of birth, death, and rebirth. Or as the world of suffering and dissatisfaction (dukkha)" [1].  He rides a white horse with a fiery sword. He will end the darkest and destructive period to remove adharma [i] and will usher in the Satya Yuga [ii][2]. 

Another reference talks about a just commander at the end-time who is the leader of angels and humans, who knows the truth and gets hold of everything from deep in the seas too high in the mountains, and no one greater than him will come to earth [3].

Saoshyant: The Eschatological Savior in Zoroastrianism

In Zoroastrianism, there are three saviors who each will rise in a thousand years. The last one is an eschatological savior figure who will destroy evil and will bring about the renovation of the world. He is called Saoshyant, which means the beneficent in its single form. Yet, in its plural form, it is considered to mean the redeemer. The Khorda Avesta describes this savior as such:

Whose name will be the victorious SAOSHYANT and whose name will be Astvat-ereta. He will be SAOSHYANT (the Beneficent One) because he will benefit the whole bodily world; he will be ASTVAT-ERETA (he who makes the bodily creatures rise up), because as a bodily creature and as a living creature he will stand against the destruction of the bodily creatures, to withstand the Druj of the two-footed brood, to withstand the evil done by the faithful. [4]
Accordingly, the Soashyant will rise at the end-time and fight against the vices in the world and spread justice and goodness far and wide. 

Maitreya: The Future Buddha

In some of the Buddhist references, such as the Amitabha Sutra and the Lotus Sutra, we read about the future Buddha of this world, called Maitreya, who will be a successor to the present Buddha. In Sanskrit, Maitreya means kindness and love. According to Buddhist religious texts, Maitreya will be the fifth and last Buddha who will appear on the earth. The arrival of Maitreya is expected at a time in the future when the dharma will have been forgotten by most on the earth. That is when Maitreya will appear on the earth to achieve complete enlightenment and to teach the pure dharma [5].

Li Hong: The Last Savior in Taoism

The Taoist last savior, called Li Hong, is depicted as an ideal leader who would reappear to set right heaven (tian) and earth (dì) at a time of upheaval and chaos. Li Hong will appear at the end of the world cycle to rescue the chosen people, who would be distinguished by certain talismans, practices, and virtues [6].

Savior in Abrahamic Religions

Moshiach: The Last Savior in Judaism

The Jews belief in the savior is manifested in the idea of the coming of Moshiach (i.e., Messiah). This person is believed to be a descendant of King David, who will "gather the Jews from all over the world and bring them back to the land of Israel" [7]. There are many verses in different scriptures and Talmudic [iii] literature which refer to this figure and enumerate his characteristics and manners [iv]. For instance, Isaiah says:

And there shall come forth a rod from the stock of Jesse [King David's father], and a branch shall grow from his roots; and the spirit of the Lord shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the Lord. And his delight shall be in fear of the Lord; and he shall not judge by what his eyes see, nor decide by what his ears hear. But with righteousness shall he judge the poor, and decide with equity for the humble of the earth; and he shall strike the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked.
–Isaiah 11:1-4

Those who follow Judaism believe that their savior has not been born yet. Therefore, they are eagerly awaiting the coming of the one who will save them and establish a just dominion in which "there will be world peace, no more wars nor famine, and, in general, a high standard of living" [7]. 

The Messiah: Jesus Christ (PBUH) the Savior of Mankind 

Christians believe that Jesus Christ (PBUH) is himself the savior of humankind, and he was born for this purpose. The name Christ literally means "the anointed one" or the Messiah [8]. As the Gospel of Matthew says, Jesus Christ (PBUH) has been sent to "Save his people from their sins" (1:20-21). It is also believed that Jesus Christ (PBUH) had been crucified to atone the sins of humanity and lead them toward salvation. According to Christian sources, Jesus Christ (PBUH) was the savior who was awaited by the Jews as whose coming was predicted in the Torah as the Moshiach. 

Another point which makes Jesus Christ (PBUH) the awaited savior in Christianity is the idea of his second coming or the Second Advent in the end-time to whose "day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father" (Mark 13:32). This is the belief in "the future return of Christ in glory when it is understood that he will set up his kingdom, judge his enemies, and reward the faithful, living and dead" [9]. Different gospels, including Matthew chapters 24–25; Mark, chapter 13; Luke, chapter 21:5–26, and John, chapter 14:25–29, are mentioned as the evidence for this belief. Moreover, according to biblical verses, there will be many signs indicating the end-time among which the second coming of Jesus Christ (PBUH) and the last judgment. 

Therefore, like many other religions, Christians also believe in a savior or as they call it the Messiah, who will make this world a better place and free it from oppression and injustice. 

Imam Mahdi (AS): The Awaited Savior in Islam

In Islam, the belief in the savior is rooted in the fact that Allah never leaves His creatures, especially human beings, on their own and support them through sending His apostles to guide them toward the right path: "and there is a guide for every people" Quran (13:7). He had sent 124000 prophets (PBUT) first, followed by righteous leaders who continued the path of previously chosen messengers of Allah. As the Quran says, "Certainly We wrote in the Psalms, after the Torah: 'Indeed My righteous servants shall inherit the earth.'" (21:105).

 Therefore, the earth will never become empty of Allah's guide, and people will benefit from these guiding lights either directly or indirectly. Imam Mahdi (AS), the twelfth leader of Muslims and a descendant of Prophet Muhammad (PBUH&HP), who is leading a secret life at the time, will ultimately rise and spread peace and humanity throughout the earth. "The Holy Prophet (PBUH&HP) informed Muslims about his reappearance, telling his names, attributes, appellations, and peculiarities" [10]. The time of his coming is unknown, and it is followed by the preparation of particular circumstances. 

The signs that indicate his coming include "Widespread injustice and oppression, the advent of Dajjal (Anti-Christ) who would misguide the thinking of the people, the advent of Sufyani who is one of the pillars of mischief and corruption on the earth, the formation of the Islamic army, which would raise up black standards, the voice of the angel of the sky giving glad-tidings of his reappearance, the coming down on earth of Jesus Christ (PBUH) and his paying allegiance to and praying behind in congregation Prayers led by Imam Mahdi (AS)" [11]

This belief in the last savior, who would stand against tyranny and injustice and remind human beings of their real value, also, highlights Islam's optimism toward the future of the world.

Finally, we have reviewed the belief in the last savior or the person who will save humankind from the evilness and destruction in this world in different faiths and religions. On a more in-depth look, we can find many similarities between these beliefs. However, the Abrahamic religions had a more precise and more tangible attitude toward the idea of the last savior and the time of his coming. Therefore, the concept of the savior is one of the most essential and significant matters regarding the future of human destiny. 

Notes:
[i] Opposite to dharma, which includes unnaturalness, wrongness, evil, immorality, wickedness, and vice. 
[ii] The period when humanity will be governed by gods and every manifestation or work is close to the purest ideal, and humanity will allow intrinsic goodness to rule supreme.
[iii] The central text of Judaism and the primary source of the Jewish religion. 
[iv] Isaiah 2, 11, 42; 59:20, Jeremiah 23, 30, 33; 48:47; 49:39, Ezekiel 38:16, Hosea 3:4-3:5, Micah 4, Zephaniah 3:9, Zechariah 14:9, Daniel 10:14. 

References:

1. Samsara
2. the man on the white horse
3. The Vishnu Purana, trans. Horace Hayman Wilson, London: Trübner & co., Book IV, Chapter 24.
4. Khorda Avesta, Translated by James Darmesteter (From Sacred Books of the East, American Edition, 1898.), Part five
5. Buddhism
6. Anna K. Seidel. "Perfect Ruler in Early Taoist Messianism: Lao-tzu and Li Hung." History of Religions, Vol. 9, No. 2/3
7. The end of days
8. what does christ mean
9. second coming
10. Sayyid Ali al-Husayni al-Milani, The Promised Savior: An inquiry into the imamate of Imam Mahdi (as) from the viewpoint of Muslim thinkers, part 1, p.8. 
11. Baqir Shareef al-Qurashi, The Life of Imam al-Mahdi, Trans. Sayyid Athar Husayn S.H. Rizvi, p.259-283. Pdf.