Worldwide , nearly 2 million premature deaths each year are linked to indoor smoke . Comment: In Tanzania , they 're producing `` clean cookstoves '' that emit far less smoke , fewer pollutants .
Worldwide , nearly 2 million premature deaths each year are linked to indoor smoke . The smoke comes when people use an open fire to cook or heat their homes , a common practice . In Tanzania , they 're producing `` clean cookstoves '' that emit far less smoke , fewer pollutants .