The consequences could be disastrous unless action is stepped up to properly collect and recycle materials, the agency warned.

联合国环境规划署警告说，除非有步骤地采取合理的材料收集和回收措施，否则后果将是灾难性的。

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The space debris problem will get worse unless action is taken to combat it, Nock says. "it's a growing problem and it's not going away."

如不采取行动消除空间碎片会变得更糟，诺克说到，这是问题日益严重，它不会消失。

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Indeed, scientists now reckon that sea levels will rise by between 50cm and 100cm by 2100, unless action is taken to curb climate change.

科学家们现在估计，如果没有有效的控制气候变化的措施，到2100年海平面将上升50 ~ 100厘米。

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Beth Polidoro says they may disappear within the next ten years unless action is taken to protect them.

VOA: special.2010.04.20

Shaun Spiers, Chief Executive of the CPRE, said the future looked bleak unless action was taken immediately.

BBC: Rural housing shortage 'worsens'

"Unless action is taken now, it's hard to see our housing crisis improving any time soon, " he said.

BBC: Government 'must do more on affordable housing'

Another Winterbourne View care home scandal could happen again unless action is taken by the government, campaigners have warned.

BBC: Winterbourne View care home scandal 'could happen again'