Vocabulary

• of use: Having practical value; useful or helpful.
• look at: To use your eyes to focus on something
• in the world: Used to emphasize a question expressing surprise, confusion, or disbelief.
• lead to: To result in some action
• around the world: In or to many countries.
• per year: For each year; annually.
• kill off: To eliminate or destroy completely; to cause to die.
• for example: As an illustration or instance.
• instead of: When one thing is replaced by another
• access: Way to enter a place, e.g. a station or stadium
• trigger: Lever on a gun that you pull to fire
• scale: Size, level, or amount when compared
• term: Conditions applying to an agreement, contract
• ancient: Very old; having lived a very long time ago
• treat: To pay for the food or enjoyment of someone else
• effective: Working efficiently to produce a desired result
• precious: Having a youthful, cute, and pleasant appearance
• hygiene: Cleanliness; being clean
• disease: Illness that affects a person, animal, or plant
• filter: Device to remove certain types of light, sound
• staggering: Causing amazement; unbelievable
• proper: Correct according to social or moral rules
• commodity: Something useful or valuable, usually for sale
• bacteria: The very small creatures that can cause disease
• cause: Belief, goal or organization that people support
• excessive: Beyond what is usual or proper
• implement: To start to do something you plan to do
• remain: To be left behind; to continue to exist
• odor: A certain smell, often strong or distinct
• cardiovascular: Concerning the heart and vessels of the body
• involve: To have or be included as a part of something
• trap: Device used for catching animals
• gravity: (Of a situation) extreme seriousness
• breed: Kind of / sort of
• facility: Piece of equipment or buildings with a special use
• primarily: In the most basic or important way
• alleviate: To lessen the severity of something
• sewage: Waste matter/excrement carried away in sewers
• regulate: To control something with rules or laws
• sink: To push something down into the ground
• fulfill: To finish or provide something successfully
• leftover: (Of food) that you didn't eat at a meal
• scope: Opportunity for action or thought
• tap: To access a liquid (e.g. in a tree) through a hole
• lead: Wire for electricity, computer, etc.; cable
• inadequate: Unsatisfactory; not good enough; not enough
• trace: To make an outline to determine a shape
• sanitation: Water systems that protect people's health
• analyze: To study carefully to find out the meaning of
• organic: Developing naturally and without a set structure
• sip: To drink just a little at a time
• neurological: Concerning, used in or practicing neurology
• contaminate: To make impure by adding a harmful element
• mineral: Substance naturally formed in the ground
• cocktail: Mixed alcoholic drink, containing spirit like gin
• point: An item to be discussed
• activate: To cause to happen; cause a chemical reaction
• foul: Terrible in smell, taste, appearance or morals
• step: Movement done as part of a particular dance
• density: Degree to which an area is filled or covered
• contamination: Being impure because of a harmful agent
• human: A person; a man, woman or child
• remove: To get rid of something completely
• disinfect: To remove bacteria by cleaning
• skyrocket: (Prices or things) to increase suddenly
• porous: With many tiny holes so liquid, etc. passes through
• health: (Person, company) being in a good condition; well
• ozone: Gas protecting the earth from the sun
• chlorine: Greenish-yellow gas with a strong smell
• large: Big; of great size; broad, tall, wide, or fat
• microbial: Concerning, involving or caused by being microbes
• sit: To take an exam
• arsenic: Strong poison used as insecticide, etc.
• small: Little in size; not big
• water: Clear liquid that forms the seas, rivers and rain
• corrosion: Deterioration in metals caused by chemical action
• coloration: The particular colors or pattern of color
• hydrating: To give or add water to something or someone
• chromium: Silvery metal element