Follow comments Enter your email to follow new comments on this article. Subscribe to Independent Premium to bookmark this article Want to bookmark your favourite articles and stories to read or reference later? Mothers living within a kilometre of a fracking site were 25 per cent more likely to have a child born at low birth weight, which increase their chances of asthma, ADHD and other issues. Article bookmarked Find your bookmarks in your Independent Premium section, under my profile Don't show me this message again. Due to the sheer scale of this comment community, we are not able to give each post the same level of attention, but we have preserved this area in the interests of open debate. Now, a new study has suggested this could be because chronic sleep deprivation can actually cause the brain to eat itself. Walking to work also brought health benefits, the University of Glasgow researchers found, but not to the same degree as cycling. Update newsletter preferences. You can find our Community Guidelines in full here.