Would you be so cavalier in throwing out a disposable razor if you knew how much it actually impacted your local environments? Would you think twice about purchasing a bottle of water if you knew how much it cost you to dispose of? That’s the question asked by the MIT SENSEable City lab these days. And they plan to see what effects one man’s trash actually has on the environment.

Inspired by the Green NYC Initiative which aims to increase the rate of waste recycling in New York to almost 100 percent by 2030 (currently, only about 30 percent of the city’s waste is diverted from landfills for recycling!), a group of MIT researchers have developed a program that uses special electronic tags in order to track different types of waste on their journey through the disposal systems of New York and Seattle. Its name? Trash Track. Trash Track will monitor the patterns and costs of urban disposal while raising public awareness about the impacts the garbage can under the sink has on the environment.

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A new report says that global warming could cost the Californian economy billions of dollars each year, through a combination of rising sea levels, and the increased frequency of wild fires and extreme weather events.

The comprehensive study (PDF), published by researcher’s at UC Berkeley, also claims that $2.5 trillion of Californian real estate assets are at risk. The clear message, says co-author Prof. David Roland-Holst, is the strong economic case for timely action to slash carbon emissions and adapt to the already unavoidable effects of climate change.

“Our report makes clear the most expensive thing we can do about climate change is nothing,” he said. “As we learned in New Orleans, turning your back on the threat of natural disaster doesn’t make it go away.”

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This growing sector, driven by both social purpose and financial promise, is attracting growing amounts of talent, money, and attention. Initially funded primarily through philanthropic support, social enterprises are now reaching the status of mainstream investment opportunities for banks, venture firms, foundations and wealthy individuals.

But with new models come new metrics, especially if this sector will continue to attract significant capital investment. These new metrics (referred to as Social Return on Investment or SROI) were one of the key topics at the recent Social Capital Markets 08 conference. The conference, held on October 13-15 in San Francisco, sought to bring together social capital and social enterprise to address this basic question of social investing: How do you measure the non-financial, social, or environmental value created by an enterprise?

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“Livestock production is one of the major causes of the world’s most pressing environmental problems, including global warming, land degradation, air and water pollution, and loss of biodiversity. Using a methodology that considers the entire commodity chain, it estimates that livestock are responsible for 18 percent of greenhouse gas emissions, a bigger share than that of transport.”

The things we choose to eat can obviously have an enormous impact on the planet and everything on it, including ourselves. Naturally then, our diet choices can say a lot about our ethics and beliefs. They can even be a political statement and a form of activism. I think that every choice we make has the potential to change the world, and certainly what I choose to eat has an impact.

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