In the developed world, electricity is cheap and as available as the nearest outlet. But in off-the-grid Africa, energy poverty is endemic. With national grid expansion lagging well behind growth in demand, increasingly Africans are looking not to centralized, fossil fuel-based solutions, but to the sun.

Freight that moves by rail instead of highway is estimated to reduce emissions by two-thirds, according to the U.S. Environmental Protection Agency. If just 10 percent of the long-haul freight currently moving by truck could be switched to rail, it would eliminate more than 12 million tons of greenhouse gas emissions per year.

Unilever United States and Canada announced that all 26 of its manufacturing and non-manufacturing headquarter facilities are now zero waste to landfill (ZLF). Other countries in which Unilever has achieved this milestone reportedly include the United Kingdom, the Netherlands, France, Germany and Japan.

Analyst Insight: Sustainability is a global business megatrend with cross-functional implications that for-profit corporations cannot afford to ignore any more than IT or quality management. Sustainability means balancing environmental impacts, social welfare and profit-making activities to promote value along the so-called "triple bottom line." Given increasingly conscientious consumers and growing limits to resource availability, success in the era of climate change will be reserved for companies that have sustainable supply chains and operations. - Nada Sanders, Professor and Iacocca Chair, Lehigh University; Director of EcoNautics Sustainability Institute

Analyst Insight: Sustainability has been on consumer packaged goods executives' minds - and part of their strategic plans - for some time now. In the past, many companies have pursued sustainability because they saw it as the right thing to do. At the same time, sustainability also creates positive morale among employees, helps to meet regulations such as those for emissions, and boosts companies' reputations. But only recently has sustainability truly been connected and aligned with financial performance. - Bruce Tompkins, Executive Director, Tompkins Supply Chain Consortium

President Barack Obama is trying to persuade the United States to adopt a cap-and-trade system to curb greenhouse gas emissions. But the European Union's Emissions Trading System "” the world's flagship effort "” is sputtering. European carbon permits, which traded at about €30 ($40) per ton a few years ago, are now hovering at about €5 per ton or less.