Oil based economy! crossword puzzle @ doc brown's chemistry

FOR PRINTING OUT ONLY
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Across:

1. The footprint we wish to reduce! (6)
5. The type of energy released on burning fossil fuels (4)
7. The sort of precipitation you get when the atmosphere is polluted by burnt sulphur in fossil fuels (4,4)
9. You want this black colouring effect from a flame at a minimum when you burn a fossil fuel (9)
10. Apart from coal, the main source of fossil fuels (3)
11. The 'stickiness' of liquids (9)
12. Natural gas has a strong smell! (5)
14. The effect believed to be created by rising carbon dioxide levels (6,7)
17. Shorthand for the largest fossil fuel economy, soon to b overtaken by India and China? (2)
20. Formula for a very cleaning burning fuel (2)
21. Computer .....(9).... helps to predict the effects of climate change.
23. Make sure you put waste into the appropriate recycling ..(3).
25. A source of heat energy rich in carbon (6,4)
27. The common name for NaCl (4)
28. Methane fuel is in this state (3)
29. A useful road surface or water-proofing material from the residue of the fractional distillation of oil (3)
30. The leftovers! (7)
31. An energy resource from plant materials (6 or 3,3)
32. A description of fuel burning (10)
33. A black material formed in a smokey yellow flame (4)
34. The original source of petrol, diesel, wax etc. (5,3)
35. The process of lighting a fuel (8)
37. A molecule that is a compound of carbon and hydrogen atoms (11)
38. To ....(7)... to re-use and minimise waste.
39. The molecule carbon forms on complete combustion (3)
40. A chemical that is consumed to provide energy (4)
43. When fossil fuels burn and some sooty carbon and/or carbon monoxide is also formed, the burning is described as (10,10)
47. The tall structure that is used to separate the components of crude oil when it is heated (13,6)
51. You should take ...(5).. in your work and reducing your carbon footprint.
55. This medical condition of the bronchial system can be worsened by air pollution (6)
56. One of the fractions from the distillation of crude oil (7)
57. ..(4).. salt is a mineral from which sodium and chlorine can be extracted.
58. You don't want one of these to leak in an oil refinery! (4)
59. The fuel for cars that is very flammable! (6)
60. The fraction from crude oil distillation that is used as an aircraft fuel (8)
61. A sugar that can be fermented to make alcohol fuel (7)

Down:

2. Sugar ..(4).. can be used to make a bio-fuel.
3. A prefix meaning small (4)
4. The process by which crude oil is separated into its components (10,12)
5. It would be ....(7)... to the environment if you would recycle as much waste as possible.
6. A very harmful material that might kill you is described as ...(5)..!
7. Symbol of another common metal that should be recycled (2)
8. Playthings often made of plastic (4)
9. Fuel or food production systems that can be maintained in the long term can be described as having good .......(14).......
13. When a hydrocarbon fuel burns and only forms carbon dioxide and water it is described as a (8,10) reaction.
15. Our source of oxygen (3)
16. Shorthand prefix for crops that have had their DNA changed (2)
18. The boiling point and viscosity of hydrocarbons all increase with increase in (4,2,8)
19. To set alight (6)
20. Formula of what is formed on burning hydrogen (3)
22. The process of removing salt from water (12)
24. A liquid source of salt (3)
26. In the future this important medium may be difficult to maintain on fertilisers based on oil! (4)
34. We use this too much rather than public transport (3)
36. A green gas manufactured from salt and used in disinfectants and plastics (8)
41. A black sticky substance from crude oil (7)
42. The formula of the carbon compound formed in the inefficient burning of a fossil fuel (2)
44. Were we all discuss the problems of the world over a cup of coffee (4)
45. The type of wide ranging thinking needed to solve the problems of the world (7)
46. Uses petrol or diesel (3)
48. The common name for the liquid fuel produced from crops (7)
49. Chemical symbol for sodium (2)
50. Useful materials which conduct heat and electricity well (6)
51. Another material that should always recycled - much could be written on the subject! (5)
52. the fuel used in heavy goods vehicles (6)
53. Formula of methane (3)
54. These convey the gas from the North Sea to England (5)
55. A lot of hot ..(3). is often expelled in debates on fossil fuels and climate change.