To have a significant chance of keeping total warming below 2° C, we need to cut global emissions of carbon dioxide and other major greenhouse gas pollutants by more than 50% by mid-century. That rapid decline needs to continue through 2100, by which time the world’s total net emissions of greenhouse gases should be close to zero, if not below zero.…
The transition to a low-carbon economy is inevitable this century, and it has already begun. It will have significant consequences for you and your family, whether the transition comes fast enough to avoid dangerous warming of more than 2° C or not…because climate action has been delayed for so long, humanity can’t avoid serious climate impacts in the coming decades — that’ll affect you and your children.
Therefore, you need to understand what is coming so that you and your family will be prepared. The defining story of the 21st century is a race between the impacts our cumulative carbon emissions will increasingly have on our climate system and humanity’s belated efforts to replace fossil fuels with carbon-free energy.
Some of the most significant impacts of climate change are ones that we likely have not foreseen. For instance, a couple of decades ago, few people imagined that the most consequential near-term impact of climate change on large parts of the US and Canada would be the warming-driven population explosion of a tiny pest, the tree-destroying bark beetle.
From “Climate Change: What Everyone Needs to Know”