Quotes from James Hoffmann

One kilogramme of coffee produces about 10 litres of carbon dioxide in the roasting process.

I must offer a word of caution here: don't invest in an espresso machine at home unless you want a new hobby.

Espresso is probably the most intolerant method of preparation of any food or drink in the world.

It is always important to remember that for the bulk of coffee producers, flavour is not the main reason they have selected a certain variety to grow.