An article by Greg Jericho in “The Guardian” raised some interesting points about denialists and those who support that climate change is happening and Global warming is going to have very serious impacts. Even BHP is getting on board that we need to change from burning CO2 in the way we currently are or we may face impacts such that “The planet will survive. Many species may not”. The last few sentences of the article may find approval with many:
"But OK, here’s both sides of the debate – for well over 40 years scientists have been researching and testing evidence that climate change is occurring due to CO2 emissions. They have found conclusive evidence that there is a link and that on the current path by 2100 global temperatures will likely reach 3C above pre-industrial levels.
The other side is that they have kept researching and testing the data, and sorry, they were wrong – it’s even worse than they thought."
If we get to 1.5°C warmer globally there will be impacts that are bad, if we get to 2°C above we are headed to a whole lot more misery. From the Summary for policy makers for the currently draft IPCC report
“If emissions continue at their present rate, human-inducedwarming will exceed 1.5°C by around 2040 (high confidence)”,
“If all anthropogenic emissions (including greenhouse gases, aerosols and their precursors) were reduced to zero immediately [my highlight], it is likely that any further warming would be less than 0.5°C over the next two to three decades (high confidence), and likely less than 0.5°C on a century time scale (medium confidence)”,
& a warning of effect for us “On land, risks of climate-induced impacts on biodiversity and ecosystems, including species loss and extinction, are substantially less at 1.5°C global warming than at 2°C. Limiting global warming to 1.5°C has large benefits for terrestrial and wetland ecosystems and for the preservation of their services (high confidence). Temperature overshoot, if much higher than 1.5°C (eg. Close to 2°C), could have irreversible impacts on some species, ecosystems and their ecological functions and services to humans, even if global warming eventually stabilizes at 1.5°C by 2100 (high confidence)”.