When the speed of human innovation and its transfer were not fast enough to keep pace with rapid ecological change, famine and disease became difficult to avoid.

如果人类社会的变革或生存方式的转换速度不能适应于生态环境的急剧恶化，饥荒和瘟疫必将不可避免地发生。

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The research of land use change is the important foundation for the ecological change research, which is also the policy-making basis for regulating the human behavior.

土地利用变化的研究是生态环境变化研究的重要基础，也是调控人类行为的科学决策依据。

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We need an acknowledgement of our present ecological plight but also a language of positive change, visions of a better future.

我们需要承认我们目前的生态困境，但也需要一种积极改变的态度，拥有对更美好的未来的愿景。

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He says the global economy must change to a sustainable system now before social issues and ecological degradation become overwhelming.

VOA: standard.2010.01.23

Prof Benton added that evolutionary change added an additional pressure to population management schemes, namely that it was much more difficult to reverse than ecological change.

BBC: Environmental change 'triggers rapid evolution'

One example of continuous observation of ecological change is provided by the Nenets in Northwest Russia, who report increases in the height of willow and alder shrubs in the tundra zone.

UNESCO: EDUCATION

Researchers at the University of Texas are warning that the invasive species from South America has the potential to change the ecological balance in the southeastern United States, largely because the ants can wipe out colonies of what's been widely considered the insect villain of the region, the fire ant.

CNN: 'Crazy ants' a threat in southern U.S.