rain that contains a high level of acid that can damage the environment. The acid forms when harmful gases from industry and vehicles mix with Water in the atmosphere

(a)  

containing acid (=a chemical substance with a ph value of less than 7)

(a)  

the become an acid, or cause a substance to become an acid

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to change or influence something. If something affects something else, it has an effect on it

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the process of planting many trees on an area of land

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containing an alkali or consisting of an alkali (=a chemical substance with a pH value of more than 7)

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the air round the Earth or round another planet

(a)  

decaying naturally in a way that is not harmful to the environment

(a)  

the variety of types of living thing in a particular region

(a)  

plant and animal substances used for fuel. Biomass duels produce less carbon dioxide than fossil fuels such as coal and oil

(a)  

a region that is classified by its climate and the types of animals and plants that are living in it. The rainforest and the tundra are biomes

(a)  

the parts of the Earth's surface and atmosphere where living things can exist

(a)  

to take air into your lungs through your nose or mouth and let it out again

(a)  

an illness affecting ,your bronchial tubes in whitch you cough and find breathing difficult

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to demage or destroy something with fire

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a serious illness caused by a group of cells in the body increasing in an uncontrolled way

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the highest leaves and branches in a forest.

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gas without colour or smell, produced when you breathe out or when substances containing carbon are burnt

(a)  

carbon dioxide and carbon monoxide that vihicles and factories produce and send into the atmosphere

(a)  

a piece of equipment fitted to a car that reduces the amount of poisonous gases that it sends into the air

(a)  

if there is a causal connection or relationship between two events, one event the other

(a)  

an event, thing, or person that makes something happen

(a)  

chloro fluorocarbon: a gas used in refrigerators and in some aerosols, cfcs can demage the ozone layer of the Earth's atmosphere

(a)  

the process of getting rid of used or waste chemicals in particular area, or the illegal activity involved in this process

(a)  

important and possibly harmful changes that some scientists believe are taking place in the world's weather because of increased pollution in the atmosphere

(a)  

a hard black substance that is dug from the ground and burned as fuel to provide heat

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concentrated liquids or substances have been made stronger by having water removed

(a)  

a result or effect of something

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the management of land and water in ways that prevent them from being demaged or destroyed

(a)  

someone who works to protect the enviroment from damege or destruction

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made dirty polluted, or poisonous by the addition of a chemical, waste, or infection

(a)  

a disagreement, especially about a public policy or moral issue that a lot of people have strong feeling about

(a)  

someone who does not like something and states their opinion about it

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a very poisonous chemical

(a)  

physical harm caused to something so that it is broken, spoiled, or injured

(a)  

likely to harm or kill someone, or to demage or destroy something

(a)  

able or likely to kill people

(a)  

a discussion in which people or groups state different opinions about a subject

(a)  

to stop using something such as a weapon, ship, or niclear power station

(a)  

the process of cutting down and removing trees, especially from large areas of land. Deforestation is bad for the environment, as there are fewer trees to take in carbon dioxide and this can lead to an increase in global warming. It also involves the destruction of habitats and can cause soil erosion

(a)  

the process by which the land of the environment becomes demaged or polluted

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the process of land becoming so dry that it cannot be used for farming. This is often the result of human activites such as overgrazing and deforestation

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to demage something so severely that it no longer exist or can never return to its normal state

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to seriously demage or completely destroy something

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a poisonous chemical produced during the process of making chemicals for killing plants

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liquid or gas that comes out of place, or the process of coming out into water or the air

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the process of getting rid of something

(a)  

a very small drop of liquid

(a)  

relating to the environment and the way organisms affect each other

(a)  

to study of the environment and the way organisms affect each other

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all the plants, animals, and other organisms in particular area, considered in relation to the environment that they live in and the way they all depend on each other

(a)  

the business of organizing and selling holidays that cause as little demage to the environment as possible

(a)  

a change that is produced in one person or thing by another

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liquid waste that a place such as a factory or farm allows to flow into a river or the sea

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a substance, especially a gas, that goes into the air

(a)  

to send something out into the air, especially gas, light, or heat

(a)  

a type of animal or plant that may soon become extinct for example because its habitat is being destroy or because it has been hunted or gathered far too much in the past

(a)  

electricity and other forms of power used for making things work

(a)  

happening because of a situation that you cannot control or prevent

(a)  

the natural world, including the land, water, air, plants and animals

(a)  

relating to the natural world and the effect that human activity has on it

(a)  

someone who wants to protect the environment

(a)  

not harming the natural environment

(a)  

gases or steam produced by an engine as it works

(a)  

a serious lack of food that continues for a long time and causes many people in a country to become ill or die

(a)  

a situation in which water from a river or from rain covers large areas of land

(a)  

covered with trees

(a)  

the science of caring for forests and the trees and other plants that grow in them

(a)  

a fuel such as coal, oil or natural gas made from decayed material from argonisms that lived many milions of years ago

(a)  

a substance such as oil, gas, coal or wood that produces heat or power when it is burned. Coal and wood are sometimes called solid fuel

(a)  

smoke or gas that has an unpleasant smell, especially harmful smoke or gas

(a)  

a substance such as air that is neither a solid nor a liquid

(a)  

to produce power

(a)  

the process by which the Earth's surface and lower atmosphere is getting warmer as a result of pollution by gases such as carbon dioxide. The heat from the sun cannot escape, leading to a general increase in the Earth's temperature called global warming

(a)  

a gas that stops heat from escaping from the Earth's atmosphere and causes the greenhouse effect. Carbon dioxide is a greenhouse gas. The level of greenhouse gases in the atmosphere has increased in recent year mainly because of the burning of fossil fuels and also because of deforestation

(a)  

the type of place that a particular organism usually lives in for example a desert, forest or lake

(a)  

dangerous, especially to people's health or safety

(a)  

using water power to produce electricity

(a)  

the state of feeling ill or of having a disease

(a)  

an effect or an influence

(a)  

to burn something completely

(a)  

deliberately become involved in a situation and try to influence the way that it develops, although you have no right to do this

(a)  

to become involved in a situation in order to try to stop or change it

(a)  

a large hole in the ground where rubbish from people's homes or from industry is buried

(a)  

to remove a chemical or mineral from something such as soil as a result of water passing through it or to be removed by this process

(a)  

a soft heavy grey metal used especially in the past for making pipes, covering roofs and in paint

(a)  

containing lead

(a)  

the process of leaking a liquid or gas/ an amount of gas or liquid that leaks out of something

(a)  

the act of cutting down trees for wood, usually in order to sell it at a profit

(a)  

weak or ill because you do not eat enough or do no eat enough of the right foods

(a)  

a gas with no colour or smell that is used as a fuel

(a)  

a position where people have the the right to criticize you or ask you why something happend

(a)  

rain that contains a high level of acid that can demage the evironment. The acid forms when harmful gases from industry and vehicles mix with water in the atmosphere

(a)  

containing acid (=a chemical substance with a pH value of less than 7)

(a)  

to become an acid or cause a substance to become an acid

(a)  

to change or influence something. If something affects something else, it has an effect on it

(a)  

something that happens in nature and cause a lot of demage or kills a lot of people for example a flood or an earthquake

(a)  

a chemical substance containing nitrogen used for improving the quality of soil

(a)  

a gas with no colour or smell that exists in large quantities in the air that we breathe

(a)  

dangerous or annoying levels of noise

(a)  

not able to decay naturally and therefore harmful to the environment

(a)  

non-renewable energy, fuel or other raw materials exist in limited amounts only and cannot be replaced once theyhave been used. Oil is an example of a non-renewable resource

(a)  

a form of energy produced durning a nuclear reaction that is used for making electrical power but can also kill or harm humans who receive too much of it

(a)  

someone who disagrees with something

(a)  

a layer of oil on the surface of a large area of water for example after a ship has sunk

(a)  

used for discribing methods of farming and food production that do not use artifical chemicals

(a)  

a living thing such as a person, animal or plant especially an extremely small living thing

(a)  

a situation in which land is damaged because the cows or other animals in it have been allowed to eat too much of the grass there or have been allowed to feed on it for too long

(a)  

to become too hot or to make something too hot, sometimes causing damage

(a)  

a chemical that consists of oxygen combined with another substance

(a)  

a hole in the zone layer thought to be caused by light reacting with some chemicals such as cfcs

(a)  

a layer of ozone in the earth's atmosphere that protects the Earth from some of the harmful effect of the sun

(a)  

to get inside an object or body by getting through something

(a)  

happening or existing for a long time or for all time in the future

(a)  

a chemical used for killing insects that damage crops

(a)  

a chemical thaht contains phosphorus, used especially for making plants grow

(a)  

the planet Earth and everything on it

(a)  

to create pollution that damages part of the environment

(a)  

a substance that is harmful to the environment, especially a chemical. Large amounts of noise, heat etc can also be pollutants

(a)  

the process of damaging the air, water, land or organisms with chemicals or other substances. Pollution is almost always caused by human activity, for example during the process of getting rid of chemical waste from factories and the production of carbon emissions from cars

(a)  

the process of working to protect something so that it is not damaged or destroyed

(a)  

to take care of something in order to prevent it from being harmed or destroyed

(a)  

used about animals, plants and other things that the law prevents people from harming

(a)  

a radioactive substance contains a very harmful form of energy that is produced durning nuclear reactions. This energy is called radiation

(a)  

the amount of rain that falls in a particular area during a particular period of time

(a)  

a forest in a tropical region of the world where it rains a lot. Rainforests are considered to be important environmental areas with large numbers of different animals and plants. The rainforest are disappearing fast because of land beingcleared for development and the activities of logging companies

(a)  

an amount of light or heat from the sun

(a)  

to improve an area of land so that it can be used

(a)  

to treat waste materials so they can be used again

(a)  

to make something smaller or less in size, amount, importance etc.

(a)  

the process or result of making something smaller or less in amount, size, importance etc.

(a)  

the act of putting new trees into a place where the orgina; trees have been cut down

(a)  

an official rule that controls the way that things are done

(a)  

to let someone leave a place where they have been kept

(a)  

renewable energy and natural materials replace themselves by natural processes, so that they are never completely used

(a)  

an area of land where wild animals or plants are officially protected

(a)  

1 not harmed or affectedby something

2 opposed to something

(a)  

a flow water or chemicals from one place to another especially when this damages the environment

(a)  

the fact that a thing is safe to do or use

(a)  

a special area where animals live in natural environment protected from people

(a)  

a severe problem is very serious and worrying

(a)  

waste from people's bodies that is removed from houses and other buildings by a system of large underground pipes called sewers

(a)  

a slightly dark area where the light from the sun does not reach because it is blocked by something

(a)  

an unpleasant thick wet substance

(a)  

energy that uses the radiotion of the sun's light and heat

(a)  

a way to solve a problem or to deal with a bad situation

(a)  

a poisonous gas with a strong smell, used in industry and often a cause of air pollution

(a)  

a powerful acid that has no colour and is very corrosive

(a)  

the development of a country or region that does not use more natural resources that can be replaced and so does not harm the environment

(a)  

to allow someone to do something that you do not like or approve of

(a)  

the process in which water passes from the surface of a plant in the air

(a)  

to keep something such as air gas or energy in a particular place

(a)  

1 an unhealthy business or economy does not make a lot of money

2 ill or not physically fit

(a)  

a chemical element that is a metal and is used for producing nuclear energy because it is radioactive

(a)  

the process by which towns and cities grow bigger and more and more people go to livein them

(a)  

the failure to use something valuable in an effective way, so that it does not produce the benefits that it could

(a)  

a natural current of air that moves fast enough for you to feel it

(a)  

to become weaker or smaller and then disappear

(a)  

a chemical element that is a blue-white metal

(a)