Businesses can lead with their values and make money, too. You don't have to simply be purely profit-driven. You can integrate social and environmental concerns into a business, be a caring business, be a generous business and still do very well financially.

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.

Recycling, packaging, businesses are changing all of those things because that's what consumers want.

It's good to stand for something, to believe in something and base your business on values.

So much business is based on the belief that we should do whatever we can within legal limits to make as much money as we can. Ben & Jerry's was based on values, and we try to operate a business that not just sells ice cream but partners with all our stakeholders - whether that's suppliers or customers - to bring about a more sustainable world.

I guess I harboured hopes that things would happen more quickly, but I'm not disappointed.

Ben & Jerry's is an indulgent dessert that should be eaten in moderation. You should not be replacing more than one meal a day with ice cream. We do not consider a pint or a tub of ice cream to be a single serving.