作为不依赖于化石资源的燃料，生物燃料逐渐得到普遍认可。但在应用上，使用高等植物的现有手段还存在极限。原因在于单位面积的收获量较小，并且还会浪费珍贵的水资源。作为解决之策，业界开始开发使用藻类的生物燃料。
If you’re like many people, when you think of algae you picture the unsightly green film that forms on neglected swimming pools and fish tanks. Scientists, however, have made some discoveries that might change the way you think about this common plant. Researchers are working on ways to use algae to reduce our dependence on fossil fuels to power cars, trucks, and even airplanes. Algae has attracted attention because it is simple and economical to grow and carries fewer financial and environmental costs when compared to other alternatives. Algae needs only water to grow, and can use fresh water, salt water, marshlands, and even wastewater for a habitat. The plant’s highly-adapted photosynthesis process allows it to thrive anywhere that abundant sunshine can be found. And even sunshine is optional for this versatile plant because scientists have discovered ways to grow algae in the dark using sugar as a food source. To use algae as a replacement for fossil fuels, oil is extracted from the plant and developed into a biofuel that can be burned in diesel engines. The yield produced from the algae has proven far greater than other biofuels currently being developed. For example, soy produces an average yield of fifty gallons of biofuel per acre per year. Canola, another common alternative, produces roughly 130 gallons of biofuel per acre per year. In contrast, scientists have found that algae can produce up to 4,000 gallons of biofuel per acre per year. In addition, because algae can be grown on water rather than land and without fertilizers, it may prove to be a more efficient and (1)environmentally sound alternative to the biofuels in use today. In the future, then, when you see algae you might think about more than just pond scum!