there are no new alternatives for energy generating plants.

all power stations using coal as fuel should be closed down.

petroleum-powered energy stations are the only substitute for dirty coal plants.

wind, nuclear and CCS are poor alternatives for immediate and large scale use.

a wide range of energy sources, conventional or not, will be necessary in the future.

45% (line 17) – the rise of world energy demand in 2007.

17% (line 19) – the increase of energetic demands predicted for 2030.

US$8 billion over 10 years (line 41) – the sum of investments in coal-fired power stations until 2015.

20 gigawatts (line 44) – the energy that can be generated from wind power in 24 American states.

$3 billion (line 61) – the amount of investments in conventional energies until the present time.

coal is not an efficient energy source to meet the world’s present needs.

it is necessary to stop consuming so much electricity in the winter periods.

the use of coal as an energy source should be condemned in the near future.

the world must continue producing coal-based energy to avoid the shortage of power.

the energy generated from dirty old coal will not be useful to prevent blackout periods.

building a huge wind energy project in Algeria since 2004.

investing in research projects to develop alternative clean energy sources.

reducing its contributions to the 400-megawatt hydrogen energy plant in Abu Dhabi.

working on a biofuel project with researchers at the California Institute of Technology.

competing with the Imperial College in London to develop flexible plastic solar cells.

“What do you say to critics, such as Jim Hansen…” (line 6)

“If you project forward the predicted growth in renewable energy,” (lines 17-19)

“So we’re going to need a broad mix of conventional and alternative energy sources.” (lines 22-23)

“We need to be working very hard on those now, but we shouldn’t kid ourselves…” (lines 36-38)

“... we ... are on track to invest $8 billion by 2015, as we said we were going to.” (lines 60-62)

encourage middle class people to use air transportation more often in their daily routines.

protest against the safety problems that have been disturbing air transportation worldwide.

inform legislators and politicians about the necessary measures to make the aviation system safer.

point out issues that have been affecting aviation and suggest ways of dealing with them.

evaluate the role of aviation from a historical perspective since the invention of the airplane.

it is an essential service and a reasonably safe means of connecting people.

it is the only way of integrating populations isolated by long-lasting war conflicts.

there is no other reliable means of transportation available nowadays.

the emerging middle class will soon be able to afford expensive air tickets.

most people in isolated countries prefer fast airplanes to slow-moving trains.

"...2 billion..." (line 16) – the actual number of middle class citizens around the world.

"...70 million..." (line 17) – the number of citizens that become members of the middle class annually.

"...90 million..." (line 19) – the number of citizens that will join the middle class in 2027.

"...more than 2,500 percent." (line 39) – the share of Chinese workers who can pay for transportation and communication.

"...one-in-a million..." (lines 61-62) – the percentage of tragedies not caused by a simple error.

the future of a nation’s economy is defined by evidences of its current economic profile.

knowing about problems in economy will certainly influence economic growth.

economic indices reveal the past and will definitely trace the future.

economic sectors might keep on growing, even though certain economically significant signs of crisis emerge.

financial indices are signs of the current economic situation and therefore represent future economic growth.

vague topics that may not be fully announced.

forbidden subjects that will never be made public.

challenging problems that are not easy to deal with.

intricate questions that have been solved by experts.

intricate questions that have been solved by experts.