Two guys walk into a bar and both ask for carbon dioxide. One dies. Why?

The first says, "I'll have CO!" The second one says, "I'll have CO, too!"

The carbon dioxide levels in our atmosphere are now higher than they’ve ever been, but there are ways that we can reduce that number by half.

Divide it by 2.

I know a joke about nitrogen dioxide...

In fact, I NO2.

Two men walked into a bar...

....The first man said “Can I have some H2O please.” The second man said “I’ll have some H2O2 please.”

The second man died.

Edit: It’s a chemistry joke.

Edit 2: H2O2 is hydrogen dioxide and kills you even though your body produces it for no reason and then produces an enzyme t...

My dad died in front of me

Before he died, he scribbled me a note. They were his last words. I decided not to open it till I was ready. A year later, I opened it and this is what is said, "You are stepping on my oxygen line".

Edit: Holy macaroni with a side of O2, thank you so much for 190 votes!!!

Edit 2: My, m...

What do little green men exhale?

Kerbin Dioxide

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