abandon (v)
/əˈbændən/

to stop something that you are doing or planning to do, especially because it is too difficult to continue

butterfly (n)
/ˈbʌtə(r)ˌflaɪ/

a flying insect with large colourful wings

contamination (n)
/kənˌtæmɪnˈneɪʃ(ə)n/

the process of making something dirty, polluted, or poisonous by adding achemical, waste, or infection

endanger (n)
/ɪnˈdeɪndʒə(r)/

to put someone or something into a situation where they might be harmed or damaged

ethnic minority (n)
/ˈeθnɪk maɪˈnɒrəti/

a group of people with the same culture and traditions who live in a place where most people have a different culture and different traditions

explore (v)
/ɪkˈsplɔː(r)/

to examine or discuss a subject, idea etc thoroughly

fauna (n)
/ˈfɔː.nə/

all the animals that live in a particular area

fine (n)
/faɪn/

a sum of money exacted as a penalty by a court of law or other authority

flora (n)
/ˈflɔːrə/

all the plants that grow in a particular region

orphan (v)
/ˈɔː(r)f(ə)n/

to make a child an orphan

subtropical (adj)
/ˌsʌbˈtrɒpɪk(ə)l/

from or relating to the warm parts of the world just north and south of the tropics

wilderness (n)
/ˈwɪldə(r)nəs/

an area of land where people do not live or grow crops and where there are no buildings

enemy (n)
/ˈenəmi/

someone who is opposed to someone else and tries to do them harm

toxic (adj)
/ˈtɒk.sɪk/

poisonous and harmful to people, animals, or the environment

chemical (n)
/ˈkemɪk(ə)l/ 

any basic substance that is used in or produced by a reaction involving changes to atoms or molecules

hike mountains (v)
/haɪk ˈmaʊntɪns/

to go up or go toward the top of mountain

sewage (n)
/ˈsuːɪdʒ/

waste matter such as water or human urine or solid waste

counter (n)
/ˈkaʊntə(r)/

the place to check and collect money of customers

invader (n)
/ɪnˈveɪdə(r)/

a country, army etc that uses force to enter another country

crash (v)
/kræʃ/

to hit something hard, making a loud noise and often causing damage