Tax 'wasteful' plasma TVs?

Tax plasma TVs ?

Excerpt from BBC news: :
"Plasma televisions, which are 50% bigger than their cathode-ray tube equivalents, consume about four times more energy, according to the government-funded Energy Saving Trust.
A cathode-ray tube TV costs about £25 per year to run and accounts for 100kg of carbon dioxide (CO2) emissions, whereas a plasma TV costs about £100 per year and accounts for 400kg of CO2. "

I can't believe plasma-tv designers have not thought about the impact on our planet! Do they live on another planet?