It helps organisms adapt to environmental changes.

它帮助生物体适应环境变化。

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If so, the green algae would have been subjected to environmental pressures that resulted in adaptations that enhanced their potential to give rise to land-dwelling or organisms.

如果是这样的话，绿藻就会受到环境压力的影响，从而产生适应性，提高它们产生陆地生物或有机体的潜力。

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Modified organisms may interbreed with natural organisms and out-compete them, leading to extinction of the original organism or to other unpredictable environmental effects.

被改造过的生物体和自然生物体混配，从而更具竞争力，使原有物种走向灭绝，或给环境带来未知的影响。

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"Traditional environmental risks are those that face largely the poor in China, risks like drinking water contaminated with infectious organisms or highly polluted indoor air from people burning wood or other dirty fuels inside homes without chimneys."

VOA: standard.2010.04.07

"We know that surface use of dispersants decreases the environmental risk to shorelines and organisms at the surface and we know that dispersants break down over weeks rather than remaining for several years as untreated oil might."

VOA: standard.2010.05.18

Thanks to a broad collection of water sample, the Tara Oceans expedition allows a better understanding of the environmental conditions affecting the sampled organisms at a global scale.

UNESCO: Tara Oceans Expedition: Call in New York.

These threats include insects, disease organisms, herbicides and environmental stresses.

FORBES: Back To The Future: Let's Reverse 25 Years Of Flawed Agbiotech Regulation

The dispersant that has been used in the largest amounts on this spill, Corexit 9500, is among the most toxic to certain organisms of all those approved by the Environmental Protection Agency for use in oil spills, according to EPA tests.

WSJ: Gauging Harm to Ecosystem Could Take Years