Yesterday's news could be tomorrow's biofuel. Photo: Lisa Batty (Flickr)

Why not do something useful with those stacks of holiday cards languishing at home? Like re-charge your cell phone.

Japan has taken recycling to the next level: Sony recently unveiled a paper-powered battery prototype. How does it work? Engineers use the enzyme cellulase to break down paper matter into glucose sugar. Combine a few more enzymes with a dash of oxygen and you get a bona fide biofuel.

The process is pulled right from nature, researchers explained: it's used by white ants and termites, which use digested wood as a form of energy.

The paper-fueled battery is still in the early stages of development, but even low-output experiments have big potential. If brought to market, the prospect of using paper waste to recharge mobile phones or run small devices such as fans or lights is a bright spot on the innovation frontier. Whether off-the-grid in rural Africa or struggling with energy payments in the U.S. or Europe, turning paper waste into usable energy can play a part in alleviating poverty.

Perhaps the newspaper industry can capitalize on this green initiative to generate a little green of its own.

Kenya is looking to the jatropha tree as a way of reducing the country’s dependence on imported fossil fuels and developing a biofuel industry.

A clean-burning oil can be extracted from the jatropha tree's seeds, which can be immediately used to power generators or be refined into biodiesel. The trees can grow even in the driest and most nutrient-depleted soils, so it doesn’t have to take up arable land needed to grow food.

Faith Odongo, a senior official at Kenya's Ministry of Energy, says that about 5,000 hectares of land are being set aside for cultivation and expects that the plant could help the country “reduce fossil fuel imports by 5 percent in the next four years” and give farmers a viable crop to grow.

Whether jatropha is a viable alternative to fossil fuels is debatable. But Continental Airlines powered a Boeing 737 for a two-hour test flight on jatropha oil mixed with algae and aviation fluid. The Los Angeles Times calls jatropha one of the "new generation of so-called sustainable biofuels that could help airlines cut fuel costs and reduce carbon emissions."

But there are drawbacks. One tree only produces two liters of fuel and the trees don't reach full maturity for four to five years.

Yet these drawbacks haven't stopped countries like India, which has set aside 100 million acres for jatropha trees and expects to use the yielded oil to "account for 20 percent of its diesel consumption by 2011," according to Time.

In this video, Al Jazeera's Yvonne Ndege explains how farmers in eastern Kenya are seeing their economic situation improve as a result of planting jatropha trees.

Biofuel production. Photo: Benjamin Weller (flickr)

Jacques Diouf made a compelling argument last fall. The chief of the Food and Agriculture Organization of the UN stated that it is absolutely the responsibility of wealthy countries to ensure that a significant part of the emerging biofuel market is produced by the developing world. Right now, the U.S., European Union and Brazil are the leading producers and consumers of biofuels. If this situation remains into the future Diouf says,

“It will mean that we had a chance to honour all our solemn pledges to banish hunger and poverty but chose to look the other way.

If we get it right, bioenergy provides us with a historic chance to fast-forward growth in many of the world’s poorest countries, to bring about an agricultural renaissance and to supply modern energy to a third of the world’s population.

To focus debate exclusively on bio¬fuels for transport is therefore to miss much of the point about bioenergy’s potential for poverty reduction. This lies more in helping 2bn people to produce their own electricity and other energy needs than in keeping 800m cars and trucks on the road.”

Mr. Diouf has called for a world summit on food security, to be held in Rome in June this year. We will be watching for what decisions come out of this meeting, which will be discussing the challenges faced by the food and agricultural sectors from climate change and bioenergy. An interview with the agriculture head on the subject of food security and rising food prices can be viewed here.