a person who sees an event, typically a crime or accident, take place.

extreme weather conditions

A natural resource that can be replaced at the same rate at which the resource is consumed

to control or limit something, especially something bad

the total carbon dioxide emissions produced by an individual, group, or location

not believable

untouched; uncorrupted

suitable for growing crops

quarrelsome, inclined to argue

cause a reaction

Steady; regular

one who doubts

express your feelings or opinions about somothing

(n.) a feeling of fear, doubt, or uncertainty

feeling uncertain about something

refuse to obey

to promote or praise energetically

unpredictably; randomly

To bring about or inflict

To put into action; execute

(n.) a passageway between rows of seats (Once we got inside the stadium we walked down the aisle to our seats.)

the back part of something

believable; reliable

reasonable; capable of being carried out

process of delivering something to people or businesses

The process of supplying water to areas of land to make them suitable for growing crops.

to set apart or designate for a special purpose; to distribute

produce heat light or energy

The change from a gas to a liquid

become less and less and slowly disappear

to change from water into steam or vapor

(v.) to float or hang suspended over; to move back and forth uncertainly over or around

to be carried away by water or air

prepare and use (land) for crops or gardening.

The gathering of ripe crops for a season

in great supply, easily available; more than enough

grain that is used to make bread and other foods

to combine with oxygen

turn into vapor (steam, gas, fog, etc.)

covered with rust

difficult to understand

shocking, surprising

shining

to send out; to give forth, as in sound or light

flash; sparkle; emit or produce sparks

Something that prevents one from moving forward

change from a solid to a liquid

put away from consideration; reject

a person who has seen someone or something and can communicate these facts

instance of something being seen

bright; brilliant; glowing

to make a long noise like the letter 's'

circle; round; ring

to become real or actual; to appear in physical form, especially suddenly

apparently

to hang

interesting

shining, bright

To disappear from sight

feelings of anxiety or dismay, typically at something unexpected

to develop

release of electrical energy

(adj.) having the quality or power of conducting heat or electricity or sound; tending to cause or bring about

happening at the same time

claim

a minute portion of matter

flash of lightning

(v.) to fight, struggle; to compete; to argue

Elements found in food that are used by the body

a material found in magma that forms from the elements oxygen and silicon

more than enough; plentiful

consisting of very small pieces

stick things together

by chance, not planned or prearranged; irregular

height above sea level

undeniably

carbon compounds that pollute the atmosphere as a result of burning fossil fuels

requiring immediate attention

expanding or growing rapidly

finally

a situation in which a good or service is unavailable

To overlap objects, and control the order in which overlapping objects appear.

chemical substance that an organism needs to sustain life

the makeup of something

to control with rules

taking one thing or a material and using it for a purpose not originally intended

specially made for a particular person or thing

substance that kills rats, insects, bacteria, etc.

to produce

very surprising

astonishing, overwhelming

To cancel the effect of; nullify

agricultural products

Having lots of leaves

is still unknown

in large quantities

Collecting money from individuals, organizations, or governments in order to achieve the NPO's mission

an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force

Impressive to look at, remarkable.

difficult to find, catch, or achieve

rain containing high amounts of chemical pollutants

the action of clearing a wide area of trees.

transported by air

A substance that causes pollution.

waste materials from industry that are poisonous to humans or other living things

Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.

gases ejected from an engine as waste products

Any form of water that falls from clouds and reaches Earth's surface.

the top layer of soil

The breakdown of the ozone layer caused by chlorofluorocarbon.

petroleum that has not been processed

Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases

Processes by which rock, sand, and soil are broken down and carried away (i.e. weathering, glaciation)

oil that has been discovered but remains unused in the ground

a side-effect; something produced in the making of something else

involving risk or danger

The water and human wastes that are washed down sinks, toilets, and showers

the remains of something that has been destroyed

something discarded; trash

to replace one thing or person for another

something that is held in reserve

A person who inherits a title or office

an indication or sign of a condition

a surprising and previously unknown fact, especially one that is made known in a dramatic way.

moderation or self-control; controlling force; restriction

something that blocks or gets in the way; an obstacle

To state or express firmly

(v.) to express agreement; (n.) agreement

to make known; to state openly

to call together, to assemble

To cut short or reduce

to make or become smaller, reduce in size

to require; to make necessary

prove that an argument an opinion a theory etc is wrong

to refuse to believe; to reject as untrue

basic; fundamental; only noticeable under scrutiny

enigmatic, impossible to understand or explain

hard to understand

brilliant; giving off heat or light

to understand

to understand

pass into or through, often by overcoming resistance

grasp mentally; understand

happening in the near future; ready; willing to help; Ex. No answer was forthcoming.

not to be denied; cannot be questioned

impossible to disprove; beyond argument

beyond doubt or question; certain

(adj.) more than enough, large, spacious

not good enough

It may be argued (used to qualify the statement of an opinion or belief)

officially; supposedly; in appearance

probably; reasonably supposed

supposedly; believed to be so but not yet proved

to make false by adding to or changing

clearly; obviously

showing concern for the needs or feelings of others

making you feel sad and sorry about something

A wide, open area or surface; a stretch

good thing to do because it is useful enjoyable

almost or approximately

be in worse condition than it used to be

doing OK under the circumstances

just the same, it does not matter

magnificent, splendid

take full advantage of an opportunity which will not last long

as soon as possible

suddenly get worse

to make the situation even more unpleasant or difficult

part of a larger area of study

to make less severe

to emphasize

make (something) appear less important than it really is

in control of a situation

something is your fault

better to do something late than not at all

that s unlikely

not expect something to happen soon

An imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole

A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center

a positive state that includes striving for optimal health and life satisfaction

walk through an area to watch or guard it

help a lot to make sth happen

allow someone to take something from you

basically

estimate

to let go, give up

affected by (usually alcohol or drugs)

adding a part to something larger

design development manufacture and operation of aircraft

reductions made in order to save money

Someone who travels at as low a cost as possible

to punish

three times as much

twice as much