Green Revolutions aren't easy. Photo: Thatcher Cook for Mercy Corps

Some at the UN Food Summit are suggesting a second green revolution is needed to curb soaring food prices. “The underlying problem is the decline in agricultural productivity growth," said the UN's Lennart Bage. "Unless we reverse that, we’ll be back in the same situation in a few years' time.”

The first Green Revolution transformed developed-country agricultural practices from the 1940s to 1960s and led to increased production. Huge investments in seed research, infrastructure development and technological advancements fueled this transformation.

Increases in output are especially needed in Africa, which is in dire need of updating its farming techniques, improving agricultural technology and increasing the biodiversity of crop output. According to The Economist, several countries at the Summit promised to meet these needs by investing in seed research, building irrigation canals, and promoting the use of fertilizer.

Regulation reform and infrastructure upgrades are also needed. The International Food Policy Research Institute recently released a report saying prices could be cut if governments enforced market regulations. They also suggested African governments should dedicate 10 percent of their budgets to agriculture, and improve poor roads that hinder farmers' ability to get their crops to market.

However, Financial Times points out why a green revolution in Africa may not be easy to pull off. It would most likely require the cultivation of genetically modified crops in a region where many countries have resisted GMO foods. Other concerns involve Africa's diversity of climate and landscapes — farming techniques that work in some places might not work in others. Increasing output would also mean huge investments in irrigation systems. A dependence on rainwater and a lack of irrigation infrastructure has hindered many small farms in Africa.

The first Green Revolution took years to increase agricultural output in developing countries. It may be needed, but engineering a second Green Revolution is a daunting task.

Alternatives to Plastic: Home Gardens. Photo: key lime_pie (flickr)

I recently came upon a blog by a Chicago woman committed to living as close to a plastic-free life as possible. Her journey to a life without plastic began last September, and over the months her postings about her adventures and increasing knowledge have gathered an audience in the thousands.

The statistics about our reliance on plastics are shocking: According to the U.S. Environmental Protection Agency, the amount of plastic in our waste stream has increased from less than 1 percent in 1960 to 11.7 percent in 2006. And, while Americans drank 50 billion bottles of water in 2006, 38 billion of those ended up in the trash, according to Fast Company magazine.

The anonymous blogger, whose blog is titled Life Less Plastic, explains that she's doing this for personal health reasons, as well to do better by the environment. Among her most popular posts is an entry describing "What I'm Doing to Be Mostly Plastic-Free," which includes:

10. Washing my dishes with Dr. Bronner's bar soap. It works! I'm not kidding!
11. Bringing my own stainless steel coffee mug to the coffee shop. This is important because paper cups are lined with plastic.
12. Bringing along a reusable water bottle or mug for water, and NEVER drinking bottled water.
13. Bringing my own takeout containers to restaurants in case I have leftovers. This sounds embarrassing, but no one has ever even noticed that I've brought my own container except for the people I'm with.
14. Not buying aluminum food cans, excluding canned tomatoes and vegetable broth, which I haven't been able to give up yet. Hopefully, I can/jar some tomatoes this summer and do away with this plastic use, though.

In a society where plastic is pervasive and packaging alternatives are few, even Life Less Plastic's author hasn't been able to do without medicine, which comes in plastic bottles; toothpaste; and even some packaged foods she hasn't been able to find in the bulk section of nearby supermarkets.

Plastics have been around for a while, but we are only beginning to understand their potentially negative consequences. Without plastic, we wouldn't have seen the advances in science and medicine we saw in the last century. However, as the Chicago blogger points out, there are a lot of ways to "live a life less plastic."