On Monday, March 20, the IPCC will be publicly releasing a report synthesizing the latest climate science, the culmination of its sixth assessment cycle. With global heat-trapping emissions still on the rise and millions of people across the world still reeling from last year’s deadly and costly climate-related disasters, this report provides a distillation of all that scientists are bearing witness to, a collective howl for action, albeit delivered in precise technical terms. Please don’t be numb to the implications of this report; please don’t give in to gloom and doom either. This report matters because it reflects our reality and helps inform a blueprint for urgent action.
The conclusions we are likely to see in the forthcoming report are already clear from the three working group reports that the IPCC has released over the last two years in this sixth assessment cycle and previous special reports. Here’s the bottom line: Because of decades of politically motivated inaction from policymakers, especially in richer countries, and the greed of fossil fuel companies bent on extracting every last bit of profit, scientific projections show that we are currently on a trajectory to exceed 1.5˚C in global average temperature increase above pre-industrial levels within the next 10 to 15 years.
It is heartbreaking and infuriating to sit with this hard reality.
Even at about 1.1˚C now, we are already in a dangerous and deeply inequitable climate crisis. Which only reaffirms, with greater urgency, what we must (still) do to address climate change: phase down fossil fuels sharply and quickly while transitioning to clean energy, make deep cuts in heat-trapping emissions, and rapidly shore up resilience to worsening climate impacts. To do that in an equitable way, richer countries must meet their responsibility to provide funding for low-income nations to meet climate goals.
What’s also clear is that this is a challenge that goes well beyond carbon emissions—it is deeply rooted in an inequitable fossil energy and economic system. To solve it will take marrying our best, most innovative clean technologies to transformative changes in our socioeconomic and political systems that will help create a healthier, safer, more just world for everyone.
Who bears responsibility for climate change?
The IPCC is clear about the varying contributions to the heat-trapping emissions fueling climate change from different regions, with richer nations contributing the most to the problem (see figure below from the IPCC working group III report). For us here in the United States, knowing that the U.S. is the largest historical emitter of CO2 emissions, responsible for about a quarter of those emissions, our responsibility to act boldly is obvious.
Who bears the impacts of climate change?
We are all experiencing climate impacts; but low-income nations, communities with the fewest resources, and those most marginalized, are bearing the brunt of these impacts (and, often, the worst of fossil fuel pollution too). The continent of Africa is among the most climate vulnerable places, as the IPCC figure below, from the working group II report, shows.

The IPCC findings make clear that climate change is significantly increasing the likelihood of many kinds of human-caused, fossil-fueled disasters. For example, the WGII report states that:
- Climate change has caused substantial damages, and increasingly irreversible losses, in terrestrial, freshwater and coastal and open ocean marine ecosystems (high confidence).
- Climate change has adversely affected physical health of people globally (very high confidence) and mental health of people in the assessed regions (very high confidence).
- Climate change is contributing to humanitarian crises where climate hazards interact with high vulnerability (high confidence). Climate and weather extremes are increasingly driving displacement in all regions (high confidence), with Small Island States disproportionately affected (high confidence). Flood and drought-related acute food insecurity and malnutrition have increased in Africa (high confidence) and Central and South America (high confidence)
And our lived experiences confirm the science.