She should be hooked up to the National Grid and set on fire - her burning bodyfat could heat a small city for 1000 years. The price of oil would plummet as a result - fuel prices would go down, the pound and other currencies would strengthen against the dollar (as oil is traded in dollars), small businesses would be encouraged to start up trading, therefore improving the economy, the recession would end and everybody would be happy.
All because of one less fat person. Simple.