I think that there is a special amount of energy in the universe and this amount of energy created by Great God who has created all the universe and manage it by his power. this amount of energy divided in to different sources like sun light and solar radiation energy, wind energy, food source energy and etc. and the energy by these sources transform from one form to another. but the whole amount of energy is constant.

Good Luck

Very good question, for the logic of glob. worming, the hot topic of discussion. Sun the main source of energy emits energy in form of light and heat, green forest and vegetation takes the energy(light) and prepare the food from carbon gas, amits Oxygen, and grow, or try to keep the balance, of energy. Human/Animal getting the energy by consuming the fruit/plants(vageitables/grains or meat/eggs and complete the cycle. The reduction in green forest vegetation and emission of more carbon gases, disturb the energy balance, with temperature rise of glob, violating, first law of thermodynamics.

thanks all for ur replies .......

@ amir javad but sir if someone do not belive in exsistence of God how could we convience them from your point of view?

Very good question, First, my response is independant of what I believe on the creation of our univers. The principle of enrgy conservation can be stated as follow: it was verified in our univers in his actual form that : If one consider a physical system of S ( for example cup of cold water or the earth) and we called S* the system formed by the univers excepted of S, then , if the energy of S increases by a quantity equal to E, be sure that this quanty is coming from the system S*, in the other manner the system S* loss the same quantity E. 

Dear Bhupendra Desai

But how sun source energy created ? how the combustion phenomena in the sun that follow a special law created ? and who create them ?

Dear Guesmia Abdelkader

I mean that there is a constant amount of energy in the universe with your example S+S* and how was it created ?

@ amir javad absolutely sir...

@ Aamir, Best Regards .....

Let me first say it is a great question.

First law of thermodynamics says the total energy of the 'Universe' is constant. You can't lose energy, you can't create energy, you just go from one form of it to another form. Mass or matter is also a form of energy so whole matter of universe is energy as well. But it leads to question how do you define the universe?? Our planet, Solar system, Our Sun is just a star, and there are infinite number of stars and must be infinite numbers of systems like our solar system, milky ways ....and so on.....and what not and we come to know that our planet is just a spec of dust in this whole 'Universe' which we don't even know how big it is. So to answer where does all the energy including matter comes from ............really difficult to say......even greatest of scientist in my opinion would not have answered it with 100% surety (please correct me if I am wrong). It is safe to say there is definitely a SUPER POWER who is the origin and creator of it. Due to lack of enough information let’s call it GOD.

@Rajeev sir ur ans cn convienc me and m accepting it.bt hw abt athesist

Hi Aamir, Good point. I think for atheists it should be 'SUPER POWER'. I think something super behind all the existence has to be there, call it God or Nature or X. 

No sir nature is jus the creation of GOD.

One more thing sir what we unable to explain we submit that thing to b explain by GOD  otherwise we are not ready to belive in the existence of GOD.

 Hi Aamir,

You say that nature was created by God but an atheist who doesn't believe in the existence of God would not say so. And I wrote 'nature & X' for an atheist's point of view. Yes you are right that anything we humans are not able to explain through logic and science we leave it to be explained by God. That is very natural too because we find ourselves not knowledgeable, wise and strong enough to explain certain thing and we by leaving it to God in a way are soliciting help from a 'Superior Power'.     

According to inflation cosmology, the observed energy (Galaxies, stars, observed matter) came from the quantum fluctuations of space at the exponentially expanding stage (inflation) of the universe. See "Cosmology" in wiki and the references therein for details.