land (n)
/lænd/

the surface of the Earth that is not covered by water

pollute (v)
/pəˈluːt/

to make air, water, or land too dirty and dangerous for people to use in a safe way

decompose (v)
/ˌdiː.kəmˈpoʊz/

to decay, or to cause something to decay

balance (n)
/ˈbæl.əns/

a state where things are of equal weight or force

climate change (n)
/ˈklaɪ.mət tʃeɪndʒ/

the way the world's weather is changing

global warming (n)
/ˈɡloʊ.bəl ˈwɔːr.mɪŋ/

the increase in temperature of the earth's atmosphere, that is caused by the increase of particular gases, especially carbon dioxide

oil slick (n)
/ɔɪl slɪk/

a layer of oil that is floating over a large area of the surface of the sea

ozone layer (n)
/ˈoʊ.zoʊn ˈleɪ.ɚ/

a layer of ozone high above the earth's surface that helps to protect the earth from harmful radiation from the sun

pollution (n)
/pəˈluː.ʃən/

damage caused to water, air, etc. by harmful substances or waste

biodiversity (n)
/ˌbaɪ.oʊ.dɪˈvɝː.sə.t̬i/

the number and types of plants and animals that exist in a particular area or in the world generally

ecology (n)
/ɪˈkɑː.lə.dʒi/ 

the relationships between the air, land, water, animals, plants, etc.

water (n)
/ˈwɑː.t̬ɚ/

a clear liquid, without colour or taste

air (n)
/er/

the mixture of gases that surrounds the Earth and that we breathe

forest (n)
/ˈfɔːrɪst/

a large area of land covered with trees and plants

fauna (n)
/ˈfɑː.nə/

all the animals that live wild in a particular area

flora (n)
/ˈflɔː.rə/

all the plants of a particular place or from a particular time in history

creature (n)
/ˈkriː.tʃɚ/

any large or small living thing that can move independently

insect (n)
/ˈɪn.sekt/

a type of small animal with six legs, a body divided into three parts, and often two pairs of wings, for example, an ant, beetle, or butterfly

reproduction (n)
/ˌriː.prəˈdʌk.ʃən/

the process of having babies, producing young, or producing new plants

wildlife (n)
/ˈwaɪld.laɪf/

animals and plants that grow independently of people, usually in natural conditions