Plants cultivate humans for the carbon dioxide.

That governments allow events to take place so they can implement security restrictions. The riots in the UK and protests across the EU are allowed, possibly even encouraged. The citizens will demand order by any means necessary and thats when the restrictions will come in.

A small one:

Samsung announced that the Galaxy Watch 4 would include a non-invasive continuous glucose monitor, which would allow you to monitor your blood sugar at any time while you wear it, for as long as you own it.

A months before the 4 was released, that feature quietly disappeared from all of the marketing, without explanation, and now, years later, is nowhere to be found.

I believe Abbott Laboratories, makers of the FreeStyle Light glucometer and the FreeStyle Libre continuous glucose monitor systems, panicked, fearing that a non-expiring, non-invasive glucose monitor would be hugely popular among diabetics, and devastate their death-grip on the market, paid a huge bribe to Samsung to drop the whole thing.

NASA was behind the moon landings.