Hello I have heard yellowstone is showing signs of an eruption

Volcanoes cannot always be easily predicted. The recent earthquakes though, might be a sign. Still, it doesn't not mean that it will erupt in the next few days.

Hi, patman16!

This sort of thing has been debated for a number of years now. If it truly did erupt with any significant magnitude, such an eruption would certainly have an effect on the climate of our planet.

Have you tried the following search, please?

Yellowstone Eruption - Google Search

Thanks!