A few years ago some scientists reported an increase in the so called greenhouse gases carbon dioxide and methane in the earth’s atmosphere. They predicted that this would result in major changes in the climate. The increase in greenhouse gas levels was attributed to the increasing demand for energy and the resultant increase of fossil fuels.

Although the existence of global warming caused by greenhouse gases has been subject to some dispute, it is now generally acknowledged to be a real phenomenon. Changes in weather patterns are seen as part of a real trend and not simply variations within the normal historical pattern. And with the release of the Stern Report of 2006, this prediction is becoming widely accepted.

Climate change conferences involving governments have been held at Rio and Kyoto resulting in Agenda 21, a commitment by states to achieve a more sustainable pattern of development for this century.  The UK is committed to reduce carbon dioxide emissions by 20% by the year 2010.

But these targets are likely to be just the beginning of a new focus on measures to slow down climate change. In 2002, the Royal Commission on Environmental Pollution recommended to the UK Government that the UK should aim to reduce emissions of carbon dioxide by 60% by 2050. There is likely to be a huge increase in the use of renewable energy technologies in the UK in order to work towards this sort of target.

The increase in oil prices intensifies the focus on efforts to stimulate the use of renewable energy.

One of the biggest advantages that solar water heating has is its ability to reduce the use of fossil fuels and thereby to help limit the emissions of harmful greenhouse gases.

A well designed solar water heating system installed in a family house which previously used an electric immersion heater to heat water can save in excess of half a tonne of carbon dioxide emissions per annum.

If installed on a large scale, therefore, solar water heating could on its own make a major contribution toward the UK reducing greenhouse gas emissions.

For the general public, solar water heating is the most practicable and effective way in which they can use and enjoy renewable energy in their own homes. People with solarheating systems in their houses can literally see (in those cases where there is a digital read-out on their system controller) and feel (in hot water) the benefits of the technology. Market research confirms that those householders who over the years have invested in solar water heating systems are very happy with their systems, which they find to be reliable and to make a major contribution to their water heating energy needs.