Another reason for the increase in bird strikes is the growing popularity of air travel in the United States.

VOA: special.2009.04.01

He says the increase in milk production reached a high of more than six kilograms per cow per day.

VOA: special.2009.05.12

Researchers believe the increase in heart rate might demonstrate what they call the fight or flight response.

VOA: special.2009.08.18

At the hearings, one of the subjects discussed was the increase in populations of large birds in North America that could threaten other planes.

VOA: special.2009.06.13

She says the increase in income has a huge effect on the whole community as well.

VOA: special.2010.06.16

The researchers say larger class sizes are another possible reason for the increase in injuries.

VOA: special.2009.08.06

The main reason is the increase in the number of visitors to the islands.

VOA: special.2009.12.16

Even more people,he says, are still suffering from the increase in food and fuel prices one year ago.

VOA: standard.2009.04.24

"We are confident the surge in U.S.military support, coupled with the increase in civilian and developmental assistance, is the best way forward,".

VOA: standard.2009.09.29

"The moral effects around the planet, the increase in morale of the radical jihadists and the damage to western civilization will be incalculable.

VOA: standard.2010.07.30

But the increase in obesity has had a disproportionate impact on Americans' health and longevity.

VOA: standard.2010.08.10

Our genetics cannot change this quickly in order to explain the increase in incidence."

VOA: standard.2010.08.09

It's just that we have to open our eyes and see." Abe attributes the increase in child poverty to the country's changing demographics, struggling economy and high social security premiums.

VOA: standard.2010.02.25

"I think when you look at the information and the statistics from the initial study, the initial paper by Dr.Nissen in 2007, the increase in the risks of heart attacks is actually small."

VOA: standard.2010.03.02