1. acid rain
acid rain is affecting western Canada ecosystems
2. carbon dioxide
Carbon dioxide is used by plants during photosynthesis
3. chemicals
A common example of a chemical substance is pure water
4. climate change
Climate Change usually refers to changes in modern climate
5. conservation
conservation is the measures to protect and restore the natural world
6. contaminant
Contaminants can be man-made substances produced by factories
7. contamination
High levels of contamination may pose major risks to people and the environment
8. deforestation
Deforestation has been practiced by humans for tens of thousands of years before the beginnings of civilization
9. drought
Periods of drought can have significant environmental, agricultural, health, economic and social consequences.
10. eco−friendly
eco-friendly used to refer to goods and services considered to inflict minimal or no harm on the environment
11. ecological
ecological economics is defined by its focus on nature, justice, and time.
12. ecologist
Ecologists are interested in the relationships between living things and have a real interest in nature.
13. ecosystem
An ecosystem is a natural unit consisting of all plants, animals and micro-organisms
14. effluent
Effluent is an outflowing of water from a natural body of water
15. endangered species
An endangered species is a population of an organism which is at risk of becoming extinct
16. environment
plants and animals living in a natural environment
17. environmental
enviromental concerned with the ecological effects of altering the environment; "environmental pollution"
18. environmentalist
The environmentalist is a person who protects the environment
19. environmentally friendly
Environmentally friendly (eco-friendly and nature friendly) are synonyms
20. extinction
The moment of extinction is generally considered to be the death of the last individual of that species
21. global warming
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans
22. greenhouse effect
The greenhouse effect was discovered by Joseph Fourier in 1824
23. noise pollution
Noise pollution can cause annoyance and aggression, hypertension, high stress levels
24. nuclear radiation
All nuclear radiations are ionizing radiations
25. organic
Organic farms do not consume or release synthetic pesticides into the environment
26. ozone
The highest levels of ozone in the atmosphere are in the stratosphere
27. ozone layer
The ozone layer is higher in altitude in the tropics, and lower in altitude in the extratropics, especially in the polar regions.
28. ozone−friendly
Ozone friendly" label can be found in most cases on deodorants and refrigerators
29. pollution
Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem
30. radioactive substance
many physicians and corporations had begun marketing radioactive substances
31. radioactive waste
Radioactive wastes are waste types containing radioactive chemical elements that do not have a practical purpose
32. radioactivity
Radioactivity was first discovered in 1896 by the French scientist Henri Becquerel
33. recyclable
Wireless phones and their accessories are recyclable.
34. recycled
The final government regulation towards increased demand is recycled product labeling.
35. recycling
Recycling involves processing used materials into new products
36. reforestation
Reforestation is the restocking of existing forests and woodlands which have been depleted
37. sewage
Sewage is the mainly liquid waste containing some solids produced by humans
38. sewage farm (GB)
sewage farm can be used as manure or disposed of safely
39. sewage plant (US)
The Wastewater Treatment Plant treats all of the sanitary sewage and a portion of the industrial wastewaters generated within the City
40. sewage works (GB)
sewage works consisting of a system of sewers for carrying off liquid and solid sewage
41. smog
Smog is a problem in a number of cities and continues to harm human health
42. solar energy
Solar thermal energy Low temperature collectors are flat plates generally used to heat swimming pools.
43. sulfur dioxide (US)
Sulfur dioxide belongs to the family of sulfur oxide
44. sulphur dioxide (GB)
sulphur dioxide smells like burnt matches
45. to become extinct
Polar bears 'could become extinct' because of melting ice.
46. to conserve
To conserve the enviroment we need recyclin all our garbage.
47. to contaminate
A man admitted threatening to contaminate Coca-Cola soft drinks with glass and deadly chemical poisons
48. to die out
49. to poison
50. to pollute
51. to recycle
52. toxic waste
53. waste disposal
54. waste disposal (GB)
55. wind power
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