Businesses typically look at issues like price, quality, time of delivery. They don't often think about social and environmental impact because they're focused on their financial bottom line.

Look at your business and the activities that you undertake. Then, start to think about not just your economic concerns, but about social and environmental impacts that businesses have.

I eat many different ice creams. I'm not an ice cream snob, although I do think Ben & Jerry's is the best. But I'm happy to eat anybody's ice cream, really. As long as it's good.

Now, when we face a problem like global warming, and you understand that the biggest impacts on global warming come from business and industry, I think business needs to take a leading role.