The problem, as with all environmental issues, is how to implement change.

和所有的环境议题一样，问题在于如何实施改变。

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Cities tend to struggle most with health-threatening environmental issues, such as the lack of safe water, sanitation and waste.

城市将受到那些威胁健康的环境问题的困扰，例如缺乏饮用水，卫生设施和废弃物处理设施。

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She said that safety studies will still need to be done to demonstrate lack of any potential health or environmental issues. The White House apparently agrees with her.

马格纳森还说我们仍然需要进行安全性研究，以证明纳米技术的使用不会造成任何潜在的健康或者环境问题。而白宫在这一点上很明显与她持同样的观点。

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The Green Summer program provided young people with hands-on experience and education on issues of environmental importance.

VOA: special.2009.09.04

But FAO Assistant Director General Hafez Ghanem cautions that government regulators need to weigh the full spectrum of economic, environmental,social and health issues associated with livestock production.

VOA: standard.2010.02.22

The government says it will now work with a new umbrella organization called the Civil Society Coalition on Land to push ahead on land rights issues including biofuels, environmental management, and sanitation.

VOA: standard.2009.08.23

Beckett Rankine said the location could support a 24-hour airport with four runways and did not have the environmental and logistical issues that came with proposals for an airport in the Thames Estuary.

BBC: Fourth South East England hub airport proposal unveiled

And the question is that will have to be dealt with and there will be long-term environmental issues associated with where the oil has come ashore.

WHITEHOUSE: Daily Press Briefing

The Lancaster Environment Centre (LEC) has long-established links with the country including the China Bridge Project, which is aimed at tackling environmental issues like global food security as well as a collaboration with the Chinese Academy of Sciences based on the environmental sciences.

BBC: Lancaster University wins award for China links