Sir

Many of the world's most reputable and best-placed scientific organizations, including the American Association for the Advancement of Science, the Royal Society, the American Geophysical Union and the American Meteorological Society, have released strong and unequivocal statements regarding the dangers the world's population faces as anthropogenic climate change gains pace. Although such statements are effective in informing public opinion and thereby influencing policy on this important issue, they are not the most powerful means available.

A more potent approach would be for scientific organizations to make ambitious, high-profile moves to reduce their own contributions to climate change. Such activity could generate significant publicity and demonstrate that the organizations are taking the threat of climate change seriously. They would send a louder, clearer message that emissions reduction should be a priority.

Such moves, although necessarily bold, should not impair the organizations' abilities to achieve their primary aims. Rather, they should publicly demonstrate that reductions in any organization's environmental impact need not reduce its effectiveness. One example would be the more widespread inclusion of video-conferencing facilities in oral sessions at scientific meetings. Another could be the introduction of 'virtual poster sessions' with live audio connections.

If well-implemented, such measures would actually increase the effectiveness of a meeting while reducing its environmental impact. In particular, those who would otherwise not attend could now participate, which would lead to an increase both in the dissemination of research findings and in the interaction between members of the organization.