The 12^th annual Environmental Film Festival Australia (EFFA) is streaming online until November 14. There's a wide selection of shorts, feature films and documentaries from around the world covering everything from a recycling centre in New York City to the moon to young climate activists in Australia. One documentary, Citizen Nobel, follows the climate activism of Jacques Dubochet, who won the Nobel Prize in Chemistry. There are also some special events including a permaculture workshop. effa.org.au

Beaver Galleries has two new exhibitions to view online. Denese Oates's Landscape in Sculpture sees the artist discover renewed inspiration in the scorched landscape. For her there are noteworthy parallels to be observed between the impact of the fires on the environment and the calamity of the last 18 months on our wellbeing. Graeme Drendel's The first dance features eclectic characters who appear to have been plucked from a variety from narratives. On until October 31: gallery open by appointment until October 28. beavergalleries.com.au

If you are feeling artistic, the National Gallery of Australia's downloadable activity sheets include: the Big Boat Adventure with Arone Raymond Weeks, making paper boats; Horse Rider Sculptures with David Wallace, using wire, wool and other materials; and Create Paper Waratahs with Jenny Kee. nga.gov.au

The Buildings That Fought Hitler (SBS, Saturday, October 16 at 5.40pm and SBS On Demand). This documentary series reveals an untold history of World War Two told through the stories of the network of buildings and structures built to defend Britain against the Nazi threat. The air raid shelters are well known, but there were many more. Thousands of these remain scattered across Britain's coastline and countryside and in its towns and cities.

On Sunday, October 17 at 10am, Belco Arts is holding a free Positive Poster Lab. Join artists Tom Campbell and Sally Holliday for this virtual working bee to create your own positive poster. The artists will take you though some tips to get connected to the creative process, and different methods you can use to make your own poster - with the message that you most need to hear right now. To make the most of the session, have your workspace set up before you arrive. You will need to have on hand: a sheet of paper to use as the base of your poster (having several ready is a good idea); art supplies such as pens, pencils, paints, scissors, glue and old magazines; and a hard flat surface on which to work. belcoarts.com.au