Learning English

• If you must do something, it is necessary for you to do it, but this is often your opinion or a rule that you have made yourself.

  If you have to do something, it is necessary for you to do it. It’s a law, an obligation or a fact.

  If you don’t have to do something, it isn’t necessary to do it, but you can if you want.

  If you mustn’t do something, it means ‘don’t do it’. It is necessary not to do it.

vegan
someone who doesn't eat meat or animal products; also an adjective describing this kind of diet

poultry
chicken and other birds which people eat 

anniversary
date on which something happened and is remembered every year 

imagine
think about something which isn't real

extensively
widely

veganism
the state of being vegan

minimising
making as small as possible

ecological footprint
the amount you affect the environment

animal rights
the idea that animals have rights

inform
tell

preaching
speaking about your beliefs forcefully in the hope others will agree with you

actions speak louder than words
a phrase that means what you do is more important than what you say, and has more influence over people