Eh? There are like 60 Chinese dynasties throughout history. The US has been around longer than most of them. And some of the dynasties that were around longer than the US has been will lose that title if the US lasts another ~30 years. The Qing, Ming, Tang, etc. dynasties all lasted ~275 years, and the US has been around for 248 by now. But the vast majority of the Chinese dynasties lasted like 10 to 50 years.

If you're concerned, you can always plant a tree or two somewhere for every project you do that uses wood. There are lots of places that let you plant trees even outside your own property.

I think they said a couple years ago that over 50 or 60% of registered users have 1 reputation.

- the box model

- how cascading, specificity, and inheritance work

- googling CSS problems with the site:stackoverflow.com filter

Bit tongue-in-cheek with that last one, but the rest will give you a solid understanding of why certain things work the way they do when your code doesn't look the way you expect.

> I can't do anything basic on CSS without turning for help

The thing is, if you are working with a whole website (even simple looking websites can have a lot of HTML and CSS), then there are often no "simple" problems, at least with layout, because every element can and often does affect every other element.

Sometimes you just need a good old analogy or picture to demonstrate some things: https://stackoverflow.com/questions/33132586/why-isnt-my-mar... (disclaimer - I wrote that answer). In a lot of ways, your elements and their CSS are like rocks in a river... the water/document flows around them in certain ways, which affects stuff around them or downstream. Removing one or adjusting it can change how the water/document flows, and thus can affect other rocks/elements, etc.

One thing I'm not happy about; opted-in recommendations for addons when you browse websites.