Space key, right arrow, or click. Sorry that you can't go back but there is no previous backdrop block, so just keep going forward till you get there.
Sources https://www.cbsnews.com/news/do-fireworks-affect-air-quality-pollution-july-4th/ https://www.treehugger.com/are-fireworks-bad-for-the-environment-4864146 I know it's overly US-centric, but it's my Fourth of July (Independence Day) project and I don't know much about fireworks outside the US. Yeah, I need to work on my patriotism.
