A complicated mix of costs, technology and environmental issues means no one source is best.

一个复杂的混合成本，技术以及环境问题意味着没有一种能源是最好的。

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Hydropower plays a significant role in the energy mix of the United States and several other countries, but environmental concerns about the damage caused by DAMS have severely limited its growth.

水电在美国和其它一些国家的能源结构中占有显著的地位，但水坝对环境造成损害的问题已经严重地限制了它的增长。

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The Baltic Sea's unusual mix of fresh water and Marine species means it's also especially vulnerable to environmental changes.

在波罗的海，淡水和海洋生物很不寻常的结合在一起，这已经表明它很容易受到环境变化的影响。

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Algae can be fed from waste-streams of CO2 from fossil-fuel power stations as a carbon elimination strategy and can also decontaminate groundwater, so there is a potential mix of environmental solutions in aid of a common goal of fuel beyond oil.

FORBES: Biofuel From Algae: Different Prognoses

Without a more sustainable and balanced energy mix, the increase in fossil fuels will be appalling and costly, and the environmental effects devastating.

FORBES: What Is Our Energy Future?

This will most likely entail increasing the corn ethanol mix in petroleum, running up food costs, depleting water supplies, and causing environmental land damage while affording no net CO2 emission reduction.

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