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Skills and Knowledge from the HCA

Demystifying Climate Change

Why climate change is important for sustainable
communities, and how to make a difference

Global average temperatures are changing and there is now a 90% certainty
that the high rate of change is a consequence of human activity. Through our
work in delivering sustainable communities, we can make a real difference in
helping to mitigate causes through reducing greenhouse gas emissions
and making allowances for adaptation.

Homes and Communities Agency focuses on the skills that professionals need to respond to these challenges. This site offers both an introduction to key sources of information and the opportunity to build your knowledge, to make a real difference in delivering sustainable communities.

What are the impacts of climate change?

In the simplest terms, our communities will need to be able to flourish whilst coping with the impacts of climate change. Key changes anticipated include:

 
 
 
  • Warmer average daily temperatures
  • Hotter summers
  • Wetter, milder winters
  • More extreme weather events
  • Sea level rise
     
 
 

Vulnerable communities

The UK Climate Impacts Programme has developed scenarios setting out how the impacts are likely to be felt in the UK which can be used to develop adaptation strategies. Climate change impacts will not affect all communities equally, with some being especially vulnerable.

Examples of vulnerable communities are those living in:

 
 
 
  • Houses situated in areas of flood plains
  • Water stressed areas and areas susceptible to drought
  • Areas without good access to open space
  • New housing stock that has not been designed with climate change adaptation in mind
  • Older housing stock that will not be resilient under future projected climate changes
     
 
 

The urban fabric turns over quite slowly so there is a need to climate-proof new and refurbished developments by providing energy-efficient homes and settlements that are resilient to future climate change impacts.

The aim

Globally, there is an urgent need to slow and reverse the growth in greenhouse gas emissions to prevent dangerous climate change. The UK has a target to reduce greenhouse gas emissions by 60% by 2050.

In a speech on the 19 November 2007,  Former Prime Minister Gordon Brown stated:

 
 

 
"The EU view is that to stand a chance of keeping the temperature increase below the 2 degrees centigrade target, and as part of a multilateral agreement, emissions from industrialised countries like Britain should be cut by 60-80% by 2050...evidence now suggests that as part of an international agreement developed countries may have to reduce their emissions by up to 80%. So we will put this evidence to the Committee on Climate Change, ask it to advise us as it considers the first three five-year budgets on whether our own domestic target should be tightened up to 80%."

     

 
 

The debate

To maintain a positive understanding of the value of and need for action, the Royal Society provides an ideal starting point for tackling the common myths about change. These include responses to common questions about, for example, how CO2 is contributing to global warming and what certainty there is in relation to the role of humans in driving the rate of change.

A first stop in responding effectively to climate change is understanding the differences and similarities between climate change mitigation and adaptation.

Mitigation

Mitigation seeks to reduce greenhouse gas emissions. It should be built in to every decision in terms of minimising impacts as far as is practical. Understanding opportunities for mitigation is a key skill for all sustainable communities practitioners and in particular for those leading on and preparing policy and strategy.

Mitigation can be achieved in a huge variety of ways, both straightforward and more innovative. The key principles of mitigation are:

 
 
 
  • Reducing the amount of energy required by end-users (demand management).
  • Reducing or omitting the carbon intensity of the energy supplied (low-carbon or
    renewable energy).
  • Reducing energy losses in production and distribution (e.g. through considering opportunities for de-centralised energy production) 
  • Protecting and enhancing important important carbon sinks (eg forests or peat bogs).
  • Identifying opportunities to use emerging technologies such as carbon capture or
  • Carbon offsetting allows for the balancing, or offsetting, of a defined unit of carbon dioxide emissions with a product that saves or stores an equivalent amount of carbon dioxide. It should only be used after a carbon reduction strategy has been implemented.

The latter two methods are commonly cited as forms of carbon offsetting.

     
 
 
 
 
 

Don't forget to visit our jargon-buster for definitions of key terms and buzzwords.
 

 
 

Adaptation

Adaptation is about responding to climate changes and making sure future communities can live, work, rest and play in a comfortable and secure environment. It is critical to understand the anticipated climate change scenarios in order to deliver appropriate adaptation measures.

From a strategic perspective there are two distinct measures necessary for securing effective adaptation:

 
 
 
  • Capacity building - creating the right social and governance structures to deliver adaptation responses at every level.
  • Delivery of adaptation responses - taking action to reduce vulnerability to climate change and maximise opportunities.