Oxfam's Sisters on the Planet campaign was launched this week with a screening in London of four short films focusing on the effect of climate change on women around the world, including Martina Longom. The films illustrate that climate change is having a disproportionate impact on people in developing countries, and that women are the worst affected.

It tends to be women who grow the family's food, fetch fuel and water, and bring up the children. So when clean water becomes harder to find during a drought, or when crops are destroyed by floods, it's up to women to find solutions.

Following the film screening, New Scientist reporter Catherine Brahic, writing in their environment blog, was unconvinced that climate change is a gender issue, but praised the films as interesting and moving.