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The Science of Climate Change

Climate change is no longer a distant threat or just a possibility, it is now a reality for all of us. In this pathway, Kevin Trenberth, a renowned climatologist, delves into the science behind climate change. He first introduces the climate system, its main components and forces.

Tackling the Plastic Crisis

Plastic pollution is by far the biggest threat to our oceans and this remains an incredibly tough problem to solve. Plastic credits could potentially serve as one of the much needed solutions for this crisis.

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The Scale of the Net Zero Challenge

The price of meeting net zero is estimated to be between $100-150 trillion over the next 30 years. Regardless of this cost, we need to reach net zero before climate change does irreversible damage to the environment and the economy.

ESG, Sustainability and Impact Jargon Buster

ESG, sustainability, impact… they all just mean green, right? Not quite. Despite being used often interchangeably, there are distinct differences between these terms.

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Featured Pathways

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The Science of Climate Change

Climate change is no longer a distant threat or just a possibility, it is now a reality for all of us. In this pathway, Kevin Trenberth, a renowned climatologist, delves into the science behind climate change. He first introduces the climate system, its main components and forces.

Tackling the Plastic Crisis

Plastic pollution is by far the biggest threat to our oceans and this remains an incredibly tough problem to solve. Plastic credits could potentially serve as one of the much needed solutions for this crisis.

More pathways

Book a demo

Pricing

Ready to get started?

Plans & Membership

Our Platform

Expert led content

+1,000 expert presented, on-demand video modules

Learning analytics

Keep track of learning progress with our comprehensive data

Interactive learning

Engage with our video hotspots and knowledge check-ins

Testing & certification

Gain CPD / CPE credits and professional certification

Managed learning

Build, scale and manage your organisation’s learning

Integrations

Connect Sustainability Unlocked to your current platform

Featured Content

More featured content

The Scale of the Net Zero Challenge

The price of meeting net zero is estimated to be between $100-150 trillion over the next 30 years. Regardless of this cost, we need to reach net zero before climate change does irreversible damage to the environment and the economy.

ESG, Sustainability and Impact Jargon Buster

ESG, sustainability, impact… they all just mean green, right? Not quite. Despite being used often interchangeably, there are distinct differences between these terms.

More featured content

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Assessing Climate Crisis Solutions

Assessing Climate Crisis Solutions

Kevin Trenberth

Former Coordinating Lead Author of the IPCC

In the earlier videos, Kevin Trenberth discussed the global responses to the climate crisis and introduced concepts such as adaptation and mitigation. In this video, Kevin delves deeper into the urgency of the problem, the changes needed and assesses some of the touted solutions to protect the earth.

In the earlier videos, Kevin Trenberth discussed the global responses to the climate crisis and introduced concepts such as adaptation and mitigation. In this video, Kevin delves deeper into the urgency of the problem, the changes needed and assesses some of the touted solutions to protect the earth.

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Assessing Climate Crisis Solutions

16 mins 45 secs

Key learning objectives:

  • Understand the urgency of the climate crisis and outline changes needed

  • Understand if reforestation will help slow down climate change

  • Understand if geoengineering will solve the climate crisis

  • Understand the need for a robust climate information system

Overview:

One of the main obstacles regarding the climate crisis is forming an integrated view of the problem. There is still a lot of political inertia and transforming the way we engage with the climate crisis is crucial. It is important to understand and assess some of the proposed solutions and conduct further research and development in the areas that are most promising. However, in order to have an accurate assessment of the climate crisis, we need an updated climate information system.

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Summary

How urgent do we need change and what do we need to change?

The IPCC mitigation report emphasises the need to reduce emissions by half by 2030. This entails decarbonisation of some of the most carbon intensive human activities such as industry, transport, urbanisation, agriculture, deforestation and power generation. Without immediate rapid large-scale reductions occurring, the 1.5°C target will be breached before 2032. Economically poor societies and geographically low-lying regions will be the worst hit while the people in these regions have generally contributed very little to the problem. 

The main obstacle here is the current dependency on fossil fuels as many power plants cannot stop operations without huge costs. Also many economies are still mistakenly pro fossil fuels and lobbying by well funded groups undermines progress. We need policies to state that there is no room for new unabated fossil-fuel projects and existing projects need to be decommissioned faster. We need major transitions and integrations across the entire system, including end users. 

Why reforestation will not solve the climate crisis

Restoring forests, called reforestation certainly has benefits, beyond just the climate. However, regarding the removal of emissions, many people falsely are under the impression that this can be achieved through growing trees. Although seemingly straightforward and cost efficient, it helps only a little. Trees have a finite lifetime and are subject to disease, infestations and drought. When trees die, as they decay they put CO2 back into the atmosphere. Additionally, they could burn and fuel wildfires, thereby releasing even more emissions. Simply growing trees without plans on what to do with them when they are harvested or when they die means they do not slow climate change.

Will geoengineering work in mitigating climate change?

“Modifying” the climate and “fixing” it is known as geoengineering. It involves the implementation of alternative devices to deal with the symptoms. It comes with considerable overhead in terms of cost and energy used. However, there could be unintended consequences and side effects that may be even worse than the original problem. Geoengineering also raises major ethical questions concerning who is entitled to make the decision (on behalf of all humanity) to intentionally change the climate. Additionally, once begun, if ever stopped, the results could be an extremely abrupt climate change with highly undesirable consequences. 

What is need for a robust climate information system?

A climate information system answers questions such as “What are we adapting to?”. A robust climate information system supports both adaptation and mitigation. One specific aspect that needs improvement is more data on social science elements to properly enable adaptation. We need more data on all of the non-natural systems constructed by humans to support their lifestyle. A robust system could provide clarity regarding the uncertainties in climate predictions, and allow for the development of sound risk-management strategies. 

 

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Kevin Trenberth

Kevin Trenberth

Dr. Kevin Trenberth is a Distinguished Scholar at the National Center for Atmospheric Research (NCAR). He was a Coordinating Lead Author of the 1995, 2001, and 2007 Scientific Assessment Reports of the Intergovernmental Panel on Climate Change (IPCC). Kevin also shared the 2007 Nobel Peace Prize which went to the IPCC and Al Gore. Between 1999 to 2006, Kevin served on the Joint Scientific committee of the World Climate Research Programme (WCRP). Kevin then went on to chair the WCRP Observation and Assimilation Panel from 2004 to 2010 and the Global Energy and Water Exchanges (GEWEX) Scientific Steering Group from 2010 to 2013. He has also served on many US national committees and is a Fellow of the American Meteorological Society (AMS), the American Association for the Advancement of Science (AAAS), the American Geophysical Union (AGU), and an honorary fellow of the Royal Society of New Zealand Te Apārangi. Kevin has received many awards throughout his career. In 2000, he received the Jule G. Charney award from the AMS; in 2003, he was given the NCAR Distinguished Achievement Award. In 2013 he was awarded the Prince Sultan Bin Abdulaziz International Prize for Water, and he received the Climate Communication Prize from AGU and in 2017 he was honoured with the Roger Revelle medal by the AGU.

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