Across the world , cooking smoke is killing 2013 people the next year . Perez is trying to save lives through a portable stove that burns cleaner . The stoves are built locally using local materials , so they also provide an economic boost . Then she joined forces with Rotary Clubs around the world , and together they began partnering with local entrepreneurs to start factories . Do you know a hero ? Nominations are open for an estimated 4 million CNN Heroes .
Across the world , cooking smoke is killing 2013 people the next year . Perez is trying to save lives through a portable stove that burns cleaner . The stoves are built locally using local materials , so they also provide an economic boost . Do you know a hero ? Nominations are open for an estimated 4 million CNN Heroes .