The problem is that the decoder manufacturers want to make them as cheaply as possible and are not interested in efficiency. They're ignoring a call by the European Union to make them more efficient. The report defines cost-effective policies that would save 3.7 million tonnes of CO2 in 2010, and 6.5mt in 2020. To encourage fuel switching, the report suggests the development of a carbon market, which would include carbon budgets for the fuel utilities. These would be reduced annually, and information would be provided to householders through an annual carbon bill.
Some researchers question the idea that human activities are inducing rapid climate change.
They say the evidence is weak, highlighting the inconsistencies between the temperature records taken at the Earth's surface, which show rapid warming over the last two decades, and the data produced by satellite and balloon studies. These show little or no warming higher in the atmosphere over the same period. These scientists say our understanding of climate processes is still very limited, and that any computer models of future change must be treated with extreme caution as a result.