Turn Down the Heat: Why a 4°C Warmer World Must be Avoided

Under current pledges and commitments, the world is likely to reach 4°C degree warming by the end of the century and 2°C warming as early as 2040. This MOOC brings together renowned scientists and policymakers to provide a synthesis of the most recent evidence and presents an analysis of likely impacts and risks, with a focus on developing countries. It chronicles already observed changes in th... view more


Setting the Context

This episode will introduce the growing and well-documented body of evidence regarding observed changes in the climate system.


What Do Emission Scenarios and Climate Models Tell Us?

This episode will explain emissions scenarios, their assumptions, and their different climate projections.


Projected Extreme Temperatures

In this episode you will learn how climate change will very likely change the length, frequency, and intensity of heat waves.


Impacts of Sea-Level Rise

This episode will walk you through the consequences of warmer temperatures specifically on sea level rise.


Increasing Ocean Acidification

This episode discusses how current emissions are affecting CO2 concentration in the oceans and resulting acidification.


Risks to Food Production and Agriculture

In this episode you will learn how temperature and precipitation changes will impact agriculture and food production.


Risks to Global Water Resources

This episode will explore how climate change will cause substantial changes in precipitation patterns.


Risks to Ecosystems and Biodiversity

This episode describes how climate change impacts to ecosystems could result in loss of agricultural productivity.


Risks to Human Health

This episode explores how most of the environmental and social impacts of climate change will affect human health.


What Happens to Coral Reefs?

This episode explores how increasing sea surface temperatures have led to coral bleaching events over last few decades.

About the Presenters

Prof. Hans Joachim Schellnhuber HBE

Director, Potsdam Institute for Climate Impact Research, Potsdam, Germany

Dr. Alan Miller

Profesor en la facultad de Derecho de la Universidad de Michigan (Estados Unidos)

Dr. h.c. Bill Hare

CEO and Managing Director, Climate Analytics, Berlin, Germany

Prof. Stefan Rahmstorf

Professor of Physics of the Oceans, Potsdam University, and Head, Earth System Analysis, Potsdam Institute for Climate Impact Research, Potsdam, Germany

Dr. Carol Turley

Especialista principal en Cambio Climático para Políticas Climáticas, Laboratorio Marino de Plymouth (PML por sus siglas en inglés), Devon (Reino Unido)

Dr. Erick Fernandes

Consejero de Agricultura, Bosques y Cambio Climático, Banco Mundial, Washington D. C. (Estados Unidos)

Dr. Peter Gleick

Presidente y cofundador del Instituto del Pacífico, California (Estados Unidos)

Dr. Janice Lough

Senior Principal Research Scientist, Australian Institute of Marine Science, Queensland, Australia

Dr. Rosina Bierbaum

World Bank Fellow, Professor of Natural Resources and Environmental Policy, University of Michigan, US

Prof. Anthony McMichael

Professor Emeritus of Population Health, Australian National University, Canberra, Australia