Noun + Verb + ing, what grammar structure is it?

I saw in my book this sentence:

Arctic animals are now in danger because of ice melting due to global warming.

I am wondering what type of grammar structure ice melting and global warming is? Is it a noun composed by noun/adjective + verb + ing? is verb + ing a noun? is it a composed noun? I am confused

Thanks

Considering Ice Melting.

A participle phrase where melting( a present participle) acts as an adjective to the noun ice. its easily discernible as you can use an adjective clause,or relative clause, and get the exact same meaning. As in ->

Arctic animals are now in danger because of the ice which/that is melting.

Or

Considering because of ice melting due to global warming A non-finite subordinating conjunction clause of the conjunction duo because-of which relies on the tense of the main clause - Arctic animals are now in danger.

Global Warming is a different matter, although similar.

Global warming is a a common phrase,a gerund phrase, where the present participle warming, this time around, acts as a noun which is modified by the adjective global.