Hello Naomi , this is another one of your open-ended philosophical questions which offers wide ranging answers . We'll probably all answer it subjectively , so we'll probably all end up disagreeing with each other , but here goes :
God sustains life . It's not as simple as it sounds . Here on earth the temperature is sustained within certain levels which can support life .In the universe you have vast temperature ranges form "absolute zero "-273 c , to thousands of degrees inside stars . On earth we are fortunate enough to have large parts of the earth within that narrow "life - sustaining " temperature band . It stays that way because of the earth's rotation and weather systems . One side doesn't roast and the other side doesn't freeze . The earth's atmosphere sustains life . The earth's rotation and its atmosphere and its oceans produce the weather systems and the rains which sustain life on the earth . It keeps the temperature within life-sustaining levels . It rinses away impurities in the atmosphere and on land when they become polluted .Thus the earth is able to "cleanse" itself . The life forms on the earth are all interdependent - an eco-system . Insects "cleanse" dead material and thrive , plants grow on soil and "manure" and thrive , they take out excess CO2 and produce oxygen for animals to thrive , animals eat plants (and other animals) and thrive . It's all an equilibrium system , it all interlocks , and if the equilibrium tilts too far one way then the life forms (especially plants , insects and microbes ) along with the earth's atmosphere and weather systems tilt it back the other way , cleansing the earth and restoring the equilibrium . Life is sustained and life goes on .It has been doing this long before human beings arrived .
What holds all of this incredible equilibrium system in place - the earth's rotation , the weather system , the eco system and so on - and all of it within this narrow temperature range that can be survived ? Is it pure co-incidence ?
In my mind it can't be . It has to be God . God sustains life .
That's my answer . I'm sure people with better scientific knowledge than me will shoot holes through it , so fire away...