Earth Warming up

Is it correct to say earth is warming up. This is because our mother earth has formed uncounted number of years back and so many creatures like living and non living organisms would have been formed and perished. It is to say that dragons have emited fire from their mouth, this creature's evicted heat also would have warmed up our mother earth but due to this, earth has not perished but only living things have perished and new things have formed. Now instead of living things man made objects are eminating heat which has to be minimised for protecting the living organisms and not mother earth. When compared with so called prior to stone age, creatures were much bigger than ours. When compared with those objects we are small in size and we can say our selves as liliputs. So we liliputs howmuch heat we can generate when compared with those old gigantic creatures. So what ever we have created is just like toys for them. So these heats will not harm our eath but will harm us. Let us think and what we can do better.