"depressing"
Why does it need to be in quotes
Because it’s a direct quote from a guy in the article.
Climate scientist Zachary Labe of Climate Central, a nonprofit that researches climate change, says the new record is “depressing” but not unexpected.
Nitpick here: they are in single quoutes which means half of fuck all.
Double quotes are for a direct quote. Single quotes are to express the intent of what was said, or for quotes within quotes.
Labe explains that the amount of CO2 in the atmosphere tends to peak in April each year as decaying plants release greenhouse gases after winter. Some of that CO2 gets reabsorbed by plants as they grow during the warmer months.
In case anyone else is wondering why it doesn't just go up continuously...
As long as the rich get to live in luxury and die right before it gets unlivable they'll continue fucking it up.
I get the feeling they plan look like this eventually. 
This might be relevant: https://www.co2meter.com/blogs/news/carbon-dioxide-indoor-levels-chart
I wonder what level of CO2 oil industry experts consider acceptable in an office?
There are not enough fossil fuels to push things up to the higher levels on that chart. Enough to destabilize the climate though
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.