Climate change not only caused by us

Dear Sir, — My letter in last week’s Chronicle regarding the Australian bushfires did not, in my view, necessitate the use of a factcheck outlining the opinion of Prof Ross Bradstock of the University of Wollongong.
If Prof Bradstock were so knowledgeable about the ongoing problem of bushfires he would not dismiss other environmentalists’ reasoning about activist interference as “very old conspiracy theories that get a run after most major fires”. He would have come up with, you would think, some practical ideas to combat such major fires.
Surely it is not difficult for a mature human being to speculate that the problems of the planet likely to affect the human race could be of the planet’s own making as it enters another period of its varied life. There is no concrete evidence to show that human activity is the sole reason, or the main contributor to climate change, if in fact it is even correct to use this expression.
People have to realise, and accept, that human beings are merely guests on Mother Earth and the planet has no responsibility or liability for their future welfare. — 
RS NORBURY 
Biddulph.
Factcheck.
While climate change means that it is not actually possible to combat fires — hotter and drier means more fires — Prof Bradstock has proposed a national inquiry into how Australia adapts to escalating bushfire risks, driven by a changing climate.
He has said that a national fire inquiry should also consider a new role for the federal government in three areas: 
● creating a national civil bushfire defence force; 
● filling “vital” gaps in what is known know about the science and costs of fires; and 
● building community capacity to adapt to bushfires.
As for “there is no concrete evidence to show that human activity is the sole reason”, the Royal Society writes: “Scientists know that recent climate change is largely caused by human activities from an understanding of basic physics, comparing observations with models, and fingerprinting the detailed patterns of climate change caused by different human and natural influences. The observed patterns of surface warming, temperature changes through the atmosphere, increases in ocean heat content, increases in atmospheric moisture, sea level rise and increased melting of land and sea ice also match the patterns scientists expect to see due to rising levels of CO2 and other human-induced changes.”