A rule which is accepted but not written down in law. For example: Let people get out of the lift before you walk in.
Conserve
Protect and secure something (animal or environment) from destruction or extinction.
Global Warming
A gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by high levels of carbon dioxide.
Culture shock
Experiencing a shock at the way people live in another country (culture).
implementation
to begin something
The implementation of the plan has begun.
Gridlock
A traffic jam that doesn't move.
Comical
funny
Climate change
Changing weather patterns.
Administration
The process or activity of running a business, organization, etc.
"The day-to-day administration of the company"
Foundation
An institution established with an endowment, for example a research body or charity.
"charitable foundations"
efficient
works well.
Greenhouse gases
The gases that form a layer in the atmosphere which stops heat leaving the earth and so contributes to global warming.
Drab
dull and boring.
Congestion
traffic not moving and blocking roads which causes traffic jams. Also, you can have a congested nose which means you can't breathe properly.
enthusiastic
keen, interested and excited about something
Emission
The production and discharge of something, especially gas or radiation.
"The effect on people's health by car emissions."
Biodegradable
A substance or object which is capable of being decomposed by bacteria or other living organisms and thereby avoiding pollution.
Revolution
A great change.
Satellite
An object that orbits the earth and collects and transmits information.
Implication
The conclusion that can be drawn from something although it is not clearly stated.
"The implication is that no one person at the bank is responsible"
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