Our primary source of the scientific facts is the Intergovernmental Panel on Climate Change (IPCC)
The IPCC has 195 member countries, including Canada.
The IPCC has three working groups: Science, Impacts, Mitigation.
The IPCC issues assessment reports. There are annual updates that are created by approximately 850 scientists.
The assessment reports have an open, public review process. This process generates approximately 150,000 comments, all of which receive a written response.
The facts captured in these assessment reports are the best science, created in a fully open and transparent process. Any suggestion that the science isn’t sound, or is a result of bias, or is some sort of conspiracy, simply isn’t true.
There is no point in avoiding the facts. If we follow a “do nothing” trajectory, the science predicts 65 gigatonnes of CO2 per year. Under the current policies that governments have committed to, the trajectory gets us to 59 gigatonnes of CO2 per year.
The IPCC makes it clear that we need to limit global warming to 1.5°C, or worst case 2.0°C. Achieving 2.0°C requires limiting CO2 per year to 40 gigatonnes of CO2 per year, and achieving 1.5°C requires limiting it to 24 gigatonnes per year.
In other words, we need to reduce our total carbon output by 45-55% by 2030, and 100% by 2050.