Green tea, as well as Oolong tea & Black tea, are produced from the herb Camellia Sinensis. They all contain the same amount of caffeine. Caffeine content in a cup of tea is 2.5% to 4%, which is about a third of that in coffee. It is claimed that 80% of the caffeine in tea remains unabsorbed by the human body.
Wood Stove Flue. It is critical to control the air moving in and out of your wood stove. Improper ventilation can cause health issues and be a fire hazard.The wood stove flue helps control this. A flue pipe is a vital part of the exhaust system of the wood stove installation. The flue gases which are released as a result of combustion of wood fuel are hotter than the normal temperature and automatically go upward so it is preferred to install the wood stove flue and chimney in the upward direction.
And, most ovens/ranges/cookers are not running sufficiently long to create problems. However, a gas cooker with a faulty gas line can be just as pernicious. And, here in the US, many states require that gas stoves (natural or LP) have kitchen fans/vents over the stove as an extra added precaution.'m not really answering your question per se, but our gas fire in our lounge does have a flue. It runs up through the wall cavity and pops out of the roof above our lounge. We have a wall gas furnace in our family room that also has a flue.