Companies are responding to the challenge of reducing greenhouse gas emissions. What's more, they are discovering that they can save money at the same time.

In groups of three, each click on one of the icons to read about a company that has already made a difference. Using symbols, pictures, numbers and no more than ten words, produce a quick poster to outline the key achievements of your company. Share your poster with the others in your group - can they make sense of it?

These companies believe that they have a duty to look after the environment and local communities. Today, this more caring approach to business is known as 'corporate social responsibility'.

Visit other company websites to find more examples of 'corporate social responsibility'. To start with, see how Shell has responded to climate change.

• Does 'corporate social responsibility' change your attitude towards a company? Would you be more inclined to buy their products?
• Apart from saving money, are there other reasons why companies might take on more 'corporate social responsibility'?

The world's biggest oil company has a very different position on climate change. Click on the icon to find out more.

"The power of consumers is uncanny. Few realize their vigilante power. Corporations know that their livelihood depends on the good will of their customers - they are afraid of revolt. A few dozen letters from angry customers can scare their pants off." Anita Roddick, founder of the Body Shop

As consumers or company shareholders, individuals can make a difference too. Go to the next page to find out what YOU could do.