Both events can have important effects on weather systems and climates around the world.

VOA: special.2009.09.29

The country has one of the best earthquake early warning systems in the world.

VOA: special.2011.03.21

It could not stand apart from the world's other money systems.

VOA: special.2010.07.01

Most of the developed world has gone through exercises to prepare their systems in the event of a pandemic.

VOA: standard.2009.04.28

An Australian company, Electro Optic Systems, has received a $3.5 million government grant to develop the world's first automated, high-precision, laser tracking technology.

VOA: standard.2010.07.24

Chan says fragile health systems in the developing world will come under increased stress.

VOA: standard.2010.01.02