"One of the risk factors for premature deaths is the air we breathe, over which individuals have little control," he said.

他说：“导致人们过早死亡的一个风险因素就是我们吸入的空气，而这是个人几乎无法控制的。”

youdao

Although in-flight infections thrive in dry environments like airplanes, your risk of getting sick from an airplane is actually low because of the air filters used.

尽管在飞机等干燥环境中，飞行的过程中很容易滋生传染病，但由于飞机上使用了空气过滤器，因此你在飞机上得病的风险实际上很低。

youdao

youdao

More than three billion people are at risk from indoor air pollution because of the heating or cooking fuels they use.

VOA: special.2010.02.01

Critics accused European air transport officials of being slow to react, then overreacting to the possible risk to airplanes.

VOA: special.2010.04.23

For every increase of five degrees Celsius in air temperature, the patients had a seven and one-half percent higher risk of migraine.

VOA: special.2009.03.18

Customers such as California's public university system and the San Francisco Giants baseball team have signed long-term outsourcing contracts with the firm to take care of their energy needs, from power and air conditioning to risk management.

ECONOMIST: Energy, the new convergence

Since Mr Bush took office, the number of days when Texan cities have exceeded federal ozone standards has doubled, and Houston and Dallas currently face federal deadlines to make sharp cuts in air pollution or risk losing federal money for their roads.

ECONOMIST: The Lone Smog State | The

Past incidents of aircraft trying to fly through volcanic ash clouds and suffering damage and engine failure led European officials to shut their air spaces rather than risk a catastrophe, said Joe Sultana, an official at Eurocontrol, the intergovernmental body that manages European air travel.

CNN: Air travel paralyzed as volcanic ash cloud lingers