Sydney Morning Herald: For a very long time people took little notice of climate change and as a result today the world faces an enormous challenge. The problem has been around ever since people began burning coal to power machines more than 200 years ago, but over the past few decades it has accelerated swiftly. Last year, for the first time, the amount of carbon pollution humans released into the atmosphere reached 10 billion tonnes. That’s more than a tonne for every person on Earth. But we Australians …