A large group of people who have come together
A crowd
Very young, not experienced or trained
As green as grass
Damage caused to water, air, etc. by harmful substances or waste
Pollution
The deepest lake in the world
Lake Baikal (the Baikal)
An area on the edge of a large town or city where people who work in the town or city often live
Suburbs
Not feeling or showing any emotions such as sympathy, fear, or worry
As hard as nails
A gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space
Global warming
Name all the oceans on the planet
the Atlantic
the Pacific
the Arctic
the Indian
the Southern
A large number of vehicles close together and unable to move or moving very slowly
A traffic jam
To be moving about quickly doing many things
As busy as a bee
An increase in the amount of carbon dioxide and other gases in the atmosphere (= mixture of gases around the earth), that is believed to be the cause of a gradual warming of the surface of the earth
Greenhouse effect
The longest river in the world
The Amazon
The busy part of the day when towns and cities are crowded, either in the morning when people are travelling to work, or in the evening when people are travelling home
Rush Hour
Very safe
As safe as houses
The cutting down of trees in a large area, or the destruction of forests by people
Deforestation
The highest mountain in the world
Everest
Explain the difference between COMFORTABLE and CONVENIENT
Completely free from dirt
As clean as a whistle
The gas produced when animal or vegetable matter is burned, or when animals breathe out
Carbon Dioxide
The country which names can be used both with "the" article and without it
Holland = the Netherlands