the daily production of biofuels in 2005 barely reached 670,000 barrels.

the USA is responsible for 15% of the world's corn production.

the production of biofuel has dramatically decreased in the last few years.

soon, one percent of transport fuel in the world will be produced from agricultural crops.

nowadays, less than 4% of the world's fuel for transportation is not derived from oil.

actually grows 40% of the sugar cane crop in the world.

currently produces biofuel that costs far more than gasoline.

will eventually lead the world market of non-diesel transport fuel.

competes with the United States for the 2% of non-diesel transport fuel.

will possibly be surpassed by the United States in terms of biofuel production.

The use of polluting internal combustion engines ought to be reduced.

Feeling guilty should be avoided since it will not be helpful in any way.

Food produced by industrialized farms should be largely consumed by the population.

Smart inventions that improve ways of producing and manufacturing must be encouraged.

People must be careful about buying most big products because they can be energy consuming.

look at.

identify.

examine.

stay away from.

keep an eye on.

follows.

approaches.

draws near

moves towards.

comes close to.

"but controllers also must direct planes efficiently…" (line 6 ).

"In addition, controllers keep pilots informed about changes in weather conditions…" (lines 17-18).

"...such as wind shear, a sudden change in the velocity or direction of the wind…" (lines 18-20).

"If the path is clear, the controller directs the pilot to a runway;" (lines 27-28).

"As the plane nears the runway, the pilot is asked to contact the tower." (lines 30-31).

mimulate.

expect.

call.

play.

hear.

"levels" (line 15).

"procedures" (line 16).

"bodies" (line 19).

"decisions" (line 20).

"airlines" (line 23).