Radiation exposure to 1,000 - 2,000 mSv can cause health problems such as . A) fatigue
B) temporary sterility in males
C) abortion of pregnancies of less than two months
D) vomiting
E) all of the above

Many of the houses have fireplaces that are 15% efficient and use 15 kg of wood to heat a room to 20 degrees celsius. wanting to reduce their ecological footprint, several of the homeowners are considering switching to woodstoves that are 75 percent efficient. if they do change to using a woodstove, how many kilograms of wood will they save per use?