Babies in South Asia were worst affected, with more than 12 million living in areas with pollution six times higher than safe levels. A further four million were at risk in East Asia and the Pacific.

南亞的嬰兒受環境污染影響最為嚴重，有超過1200萬的孩子生活在污染超標六倍的環境當中。而在東亞和太平洋地區，則有超過400萬的孩子受到影響。

Unicef said breathing particulate air pollution could damage brain tissue and undermine cognitive development.

聯合國兒童基金會稱，吸入特定的有害氣體，可能會損壞腦組織并降低認知能力。

Its report said there was a link to "verbal and non-verbal IQ and memory, reduced test scores, grade point averages among schoolchildren, as well as other neurological behavioural problems". The effects lasted a lifetime.

該基金會的報告稱，環境污染與“語言和非語言智力、學生不斷降低的測試成績、平均成績以及其他神經問題”都有聯系，而這種影響會持續終身。

As more and more of the world urbanises, and without adequate protection and pollution reduction measures, more children will be at risk in the years to come," Unicef said.

聯合國兒童基金會稱，隨著世界各地城市化越來越普及，但卻沒有任何合適的保護以及降低污染的措施，未來將會有更多的孩子被暴露于環境污染的危險之中。

It called for wider use of face masks and air filtering systems, and for children not to travel during spikes in pollution.

該基金會呼吁在污染高峰期間，要大范圍使用口罩，而且盡量不要外出。

Last month hazardous smog began blanketing the Indian capital Delhi, prompting the Indian capital's chief minister Arvind Kejriwal to say the city had become a "gas chamber".

上個月，印度首都德里發生了嚴重的霧霾，德里首席部長凱杰·里沃得爾稱該市已經成為一個毒氣室。

Some schools in the city were closed but there was criticism when they re-opened, with parents accusing the authorities of disregarding their children's health.

德里的很多學校停課，當這些學校恢復上課后，遭到了一系列批評，家長們指責學校罔顧孩子們的健康。

Indian and Sri Lankan cricketers playing in Delhi vomited on the pitch during high levels of pollution.

此外，由于空氣污染太過嚴重，印度和斯里蘭卡的板球運動員竟然在比賽期間就在球場上嘔吐起來。

Satellite imagery used to compile the data also revealed that the issue was growing in African cities, Unicef said.

聯合國兒童基金會稱，用來收集數據的衛星云圖顯示，在非洲，這一污染問題也在逐漸加重。

Meanwhile a separate study by scientists at hospitals in London found that the British city's polluted air was leading to lower birth weights, linked to higher infant mortality.

此外，一項由倫敦科學家進行的獨立研究顯示，英國城市的污染的空氣，導致了新生兒出生體重過輕，并且與更高的嬰兒死亡率有所關聯。

Babies in South Asia were worst affected, with more than 12 million living in areas with pollution six times higher than safe levels. A further four million were at risk in East Asia and the Pacific.

南亞的嬰兒受環境污染影響最為嚴重，有超過1200萬的孩子生活在污染超標六倍的環境當中。而在東亞和太平洋地區，則有超過400萬的孩子受到影響。

Unicef said breathing particulate air pollution could damage brain tissue and undermine cognitive development.

聯合國兒童基金會稱，吸入特定的有害氣體，可能會損壞腦組織并降低認知能力。

Its report said there was a link to "verbal and non-verbal IQ and memory, reduced test scores, grade point averages among schoolchildren, as well as other neurological behavioural problems". The effects lasted a lifetime.

該基金會的報告稱，環境污染與“語言和非語言智力、學生不斷降低的測試成績、平均成績以及其他神經問題”都有聯系，而這種影響會持續終身。

As more and more of the world urbanises, and without adequate protection and pollution reduction measures, more children will be at risk in the years to come," Unicef said.

聯合國兒童基金會稱，隨著世界各地城市化越來越普及，但卻沒有任何合適的保護以及降低污染的措施，未來將會有更多的孩子被暴露于環境污染的危險之中。

It called for wider use of face masks and air filtering systems, and for children not to travel during spikes in pollution.

該基金會呼吁在污染高峰期間，要大范圍使用口罩，而且盡量不要外出。

Last month hazardous smog began blanketing the Indian capital Delhi, prompting the Indian capital's chief minister Arvind Kejriwal to say the city had become a "gas chamber".

上個月，印度首都德里發生了嚴重的霧霾，德里首席部長凱杰·里沃得爾稱該市已經成為一個毒氣室。

Some schools in the city were closed but there was criticism when they re-opened, with parents accusing the authorities of disregarding their children's health.

德里的很多學校停課，當這些學校恢復上課后，遭到了一系列批評，家長們指責學校罔顧孩子們的健康。

Indian and Sri Lankan cricketers playing in Delhi vomited on the pitch during high levels of pollution.

此外，由于空氣污染太過嚴重，印度和斯里蘭卡的板球運動員竟然在比賽期間就在球場上嘔吐起來。

Satellite imagery used to compile the data also revealed that the issue was growing in African cities, Unicef said.

聯合國兒童基金會稱，用來收集數據的衛星云圖顯示，在非洲，這一污染問題也在逐漸加重。

Meanwhile a separate study by scientists at hospitals in London found that the British city's polluted air was leading to lower birth weights, linked to higher infant mortality.

此外，一項由倫敦科學家進行的獨立研究顯示，英國城市的污染的空氣，導致了新生兒出生體重過輕，并且與更高的嬰兒死亡率有所關聯。