[yldstrk]

Denver used to be under an ocean. Does anyone think one single solitary thing could have been done by humans to change that ocean disappearing?

[TexasGator]

“Denver used to be under an ocean.”

When was that?

[Tell It Right]

Agreed. The climate is changing with multiple cycles occurring simultaneously.

We're currently in the Modern Warm Period (bottom graph's bump on the right) of the Holocene glacial (middle graph's bump on the right, which began maybe 12K years ago), of the Quaternary Glaciation/Ice Age (top graph's far right hook beginning roughly 2.5 million years ago).

Below are the ice age cycles from the past 2.4 billion years.

This graph below are the glacial cycles from the past half million years.

Last but not least are the cycles we've experienced roughly every 1,000 years. (I said "roughly".) Our Modern Warm Period has been going on for the past 2 centuries or so. If it lasts as long as the past 3 warm periods, we've got another 2 to 4 centuries of it before we enter another cooling period.

[1Old Pro]

Denver used to be under an ocean. Does anyone think one single solitary thing could have been done by humans to change that ocean disappearing?

Nope, the parks like Zion, as the earth plates literally pushed up mountains, are not controllable by man. We can keep water and air cleaner, that's about it. That of course is barring anything nature would do to change that.