There are vending machines but they generally don't serve hot food or nearly the same amount of variety as Japanese machines do. Usually only soft drinks and shelf-stable snacks like candy bars, chips, cookies or crackers.
I don't usually donate to charities because the vast majority of the donation never actually goes to the cause it was donated for in the first place. However, I try to give cash to the homeless as often as Ican. On my drive home I frequently see homeless people and I try to give money and also bottled water that I usually have in my car. I don't know what they'll use it for, but it's something I can do right there and then for them and I know they at least have the opportunity to buy some food / necessities, and I know they have water.
As other people have said it's somewhat all of the above, though the biggest and most visible on xray is the narrowing of the joint space from deterioration of the cartilage. This causes arthritis, and also calcification of the joint which is also all worsened with age and varying bone density which can change based on things like ancestry, gender, habits (drug use/smoking) or medical conditions.
Edit: I also forgot to mention that occupation can make a big difference here. Being overweight AND having a job that is strenuous on the knees (construction/manual labor/heavy lifting) is a bad combo which can lead to joint deterioration and premature joint replacement as well.
Rad tech here: most people who have this phenomenon have arthritic knees from being fat. Internet disclaimer: I DIDN'T SAY ALL. But a huge number of people get to 30s or 40s and are overweight or have been for a significant part of their life and have worn out their knees at an early age. Then they come to get xrays with "idiopathic" knee pain.
This is so true of so many companies nowadays. The fact of the matter is that the big leaps in profit/efficiency/effectivness have basically all happened in most of these industries and so often people are pressed to make these sweeping changes because there isn't any real way to improve on a system like this.
Huuuuuge paraphrase there but the book is insane and while the kid with the broken leg is away the one who knocked him out of the tree starts wearing the one with the broken leg's clothes and all kinds of weird shit
A separate peace was a book we got in highschool where a kid possibly has homosexual feelings for another and throws him out of a tree which shatters his leg and eventually kills him.
There are vending machines but they generally don't serve hot food or nearly the same amount of variety as Japanese machines do. Usually only soft drinks and shelf-stable snacks like candy bars, chips, cookies or crackers.