LANZHOU, Dec. 17 (Xinhua) -- A new study on the Qinghai-Tibet Plateau has provided key evidence for evaluating the permafrost carbon feedback in climate change, according to the Northwest Institute of ...

Thirdhand smoke is the toxic residue from tobacco smoke that adheres to surfaces such as walls, furniture, carpets and curtains. Unlike secondhand smoke, which is inhaled directly from the air, this ...