the process of making air, water, soil etc dangerously dirty
pollution
to ask someone for a particular amount of money for something you are selling
charge
having a duty to be in charge of or to look after someone or something
responsible
something that tests strength, skill, or ability, especially in a way that is interesting
challenge
to make a long and difficult journey, especially on foot
trek
beautiful, attractive, or graceful
elegant
someone who illegally catches or shoots animals, birds, or fish, especially on private land without permission
poacher
to make someone feel ashamed, nervous, or uncomfortable, especially in front of other people
embarrass
continuing for only a limited period of time
temporary
the ability to control your mind and body in order to achieve something that you want to do
willpower
to tell information to someone and be given information in return
swap
very big in size or in amount
enormous
when you swim under water using just a mask and a breathing pipe
snorkelling
to see something happen, especially a crime or accident
witness
happening or done very quickly and in a very short time; fast
rapid