Question

What is "some say" and "world wide" an example of

Fire and Ice
Some say the world will end in fire,
Some say in ice.
From what I’ve tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice
Is also great
And would suffice.*
— Robert Frost
________________
*suffice: be enough

Answer 1

some say - what some people think

world wide - what would happen to the whole world

hope this helps