by world record job creator (the 2030 now world bank president) Jim Kim : 1
Overview This overview presents the main topics this course
will cover, and provides a summary of the key impacts and challenges of a 4°C warmer world.
Week 1: Observed Climate Changes and Impacts: Hundreds of Thousands of Years to Now This module
outlines the historical observed changes in the climate system leading up to the present day and the impacts that can now
be attributed to human-induced climate change. It examines the rise of greenhouse gas emissions since preindustrial times,
while explaining the link between CO2 concentrations and the rising global mean temperature, ocean heat storage and sea-level
rise, as well as uncertainties in the scientific evidence. It also describes the trends of increasing loss of ice in Greenland
and Antarctica, increasing loss of Arctic sea ice, melting mountain glaciers, increased heat waves and extreme temperatures,
and drought and aridity trends.
Week 2: Possible 21st Century Climates
This module provides an overview of the projected changes in climate leading up to the end of the 21st century. It describes
the likelihood of a 4°C warmer world by 2100 AD and enables a deeper understanding of various climate models with different
projections and key areas of uncertainty. It also reviews possible responses from natural systems, explaining how the projected
climatic changes from 2°C to 4°C warming could result in sea-level rise, heat waves and extreme temperatures, and
Week 3: Life in a 4°C Warmer World This
module presents an overview of current and projected climate impacts across key human support systems, such as agriculture
and food production, water resources, ecosystems and biodiversity, and human health. Each of these human support systems will
be negatively impacted by climate change under a 4°C warming scenario, resulting in adverse consequences for development,
such as: diminishing crop yields, which threaten food production and human health; loss of biodiversity; the spread of vector-borne
diseases; and water scarcity. The module also highlights the risks of nonlinear and cascading impacts and the risk of crossing
critical thresholds for nonlinear tipping elements of the Earth system, which could dramatically increase vulnerability to
climate change and impose multiple stresses on development.
4: What Can We Do About It? The Choice Is in Your Hands (Discussion) After having outlined the scientific evidence in previous
modules, this final module goes beyond the Turn Down the Heat report and provides a discussion on what mitigation and adaptation
action is needed to help avoid a 4°C world, while also decreasing vulnerability to climate change impacts and building
climate resilience. As no single policy solution exists, this module shares different perspectives on what can be done at
the global, national, and subnational levels, as well as at the individual level, to help transition towards a low-emissions,
climate-resilient development path. By discussing the rationale for acting now, acting together and acting differently, the
module presents examples and the expected benefits of mitigation and adaptation policies, considering both contributions to
global emission reductions and local development opportunities.