With 165.5m individual ticket sales [in the UK], film remains a medium with the capability to reach a large and wide-ranging audience. Here, we take a look at ... documentaries which thrust sustainability issues into the spotlight. Food Inc provides an in-depth focus on the 21st century food industry, contending that the major corporation 'factory-model' has scant regard for either animal welfare or consumer well-being in the pursuit of profit. The documentary investigates the meat and grain industries, highlighting the lack of transparency between major food businesses and their customers. Gasland focuses on the process of hydraulic fracturing, better known as fracking - the controversial method used to extract natural gas from the ground. The film looks at the major energy industry's attempts to take advantage of the potential resources of a small town, and the apparently disastrous impact on the local environment, particularly the water supply. Who Killed the Electric Car? While documenting the development of the electric car, the film brings to account the corporations and government officials responsible for undermining and legislating against this innovation. Blue Gold: World Water Wars ... looks at the corporate and political machinations surrounding the world water supply and the increasing demand for it. As well as a rebuke for those attempting to stockpile and over-charge for what is an essential to human existence, it provides stories of those fighting for more open access to water supplies.