^9:2 When he opened the Abyss, smoke rose from it like the smoke from a gigantic furnace. The sun and sky were darkened by the smoke from the Abyss.

When he opened the Abyss,

The one who was given the key in the previous verse opens the PIT.

smoke rose from it like the smoke from a gigantic furnace.

Smoke is an indication of wrath and anger, Psalm 18:7-8-15.

If hell is at the center of the earth, as some commentators believe, then there really is no bottom but only up. The entities in the PIT are angry for being bound there. Recall that the curse of sin is upon the earth, ALL OF IT!

The PIT is where the beast arises: Revelation 11:7 and Revelation 17:8. It is the place of certain demons, Luke 8:31 and the realm of the dead, Romans 10:7.

The sun and sky were darkened by the smoke from the Abyss.

So opening the PIT, darkens the SUN. Literally, the sun is our source for energy to allow life to exist. The whole life cycle is dependent of the sun. So darkening the sun affects life directly. So, too, in the spiritual realm, smoke obscures the SON except for that mixed with MUCH INCENSE, Revelation 8:3-4.

An aside note: Those who believe that global warming is caused by burning material or the smoke thereof should be unhappy that the climate will get warmer. However, the reader should see the alternate consequence of smoke from the PIT. The smoke in this verse is spiritual in nature. The reader can explain why that is so.