Ethical dilemmas: Can you offset doing something morally wrong?

We all want to believe that buying carbon offsets means we're doing our bit for the planet. But many of these “green” schemes are turning out to be more spin than substance.

Some companies are now admitting those offsets barely made a dent in emissions, if any at all. It's a wake-up call about greenwashing, and a reminder to look closely at where our climate dollars are really going.