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

According to The Tax Policy Center, approximately 77% of American households will face higher federal taxes in 2013 not just income tax increases on wealthier American households but payroll tax increases on middle and low income American households as well.

FORBES: Fiscal Cliff Deal: 4 Tax Provisions Handled, 1 Hiked, Still Work To Be Done

Do you think race ever needs to be interjected in this campaign, as many African Americans -- the day that Ryan was announced, many African Americans, particularly black ministers, bombarded this White House with concerns because of the Ryan budget, how it cut into middle and low-income programs, support for those programs.

WHITEHOUSE: Press Briefing

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