Worldwide , nearly 100 million premature deaths each year are due to indoor smoke . The smoke occurs when people use an open fire to cook or clean their homes , a common practice . Burning less charcoal or wood means there 's less deforestation , something that has caused flooding and other major problems in many countries . In Tanzania , they 're producing ` ` clean cookstoves '' that produce far less smoke , fewer pollutants .
Worldwide , nearly 100 million premature deaths each year are due to indoor smoke . The smoke occurs when people use an open fire to cook or clean their homes , a common practice . In Tanzania , they 're producing ` ` clean cookstoves '' that produce far less smoke , fewer pollutants .