Around 9 in 10 people in low-and middle-income countries live in places where they regularly experience dangerous levels of outdoor air pollution.

在低收入及中等收入国家，大约十分之九的人生活在室外空气污染经常达到危险程度的地方。

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Globally, uncorrected refractive errors are the main cause of visual impairment; cataracts remain the leading cause of blindness in middle - and low-income countries.

在全球范围内，未经矫正的屈光不正是视力损害的主要原因，在中、低收入国家，白内障仍然是致盲的主要原因。

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WHO supports Member States as they work to reduce the toll of COPD and coordinates international efforts to improve global respiratory health, particularly in middle- and low-income countries.

世卫组织支持会员国致力减少慢性阻塞性肺病的危害，并协调国际努力改善全球呼吸道健康，尤其是在中低收入国家。

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A new study says the leading cause of disability in older people in low and middle income countries is dementia.

VOA: special.2009.12.28

The study says the elderly are nine percent of the total population of low and middle income countries today.

VOA: special.2009.12.28

In low and middle income countries, heart disease and cancer get much of the attention given to chronic diseases.

VOA: special.2009.12.28

He will talk much of what he calls the "squeezed middle", the low and middle-income families feeling the pain of lower living standards and job insecurity as the economy stagnates.

BBC: Landale online: Time for Ed Miliband to reach out

This trend has restored some semblance of household wealth for homeowners from low income and middle income sectors of the population.

FORBES: The Wealthiest 20% Own 72%; The Poorest 20% Only 3%

The additional revenue generated from a responsible estate tax would reduce the deficit reduction pain that would otherwise will fall on middle- and low-income households.

FORBES: Warren Buffett And George Soros Want Higher Estate Tax Than Obama Proposes