Gas cookers are contributing to the early deaths of around 40,000 Europeans a year, the first scientific study of its kind has concluded. For almost 50 years, the world has been aware of the dangers of nitrogen dioxide (NO2) emitted by gas cookers. Now researchers at the University Jaume I’s School of Health Sciences in Spain have estimated the annual death toll by linking existing health studies to NO2 readings at European homes. They found that in 14 European countries, hazardous conditions are created inside the average home as the fumes from gas cookers combine with background pollution to…