Further Reading

R. Kwok. “Secret signals.” Science News for Kids. Jan. 15, 2013.

 

J. Raloff. “Exhaled air: A problem in buildings?Science News for Kids. Oct. 30, 2012.

 

A.P. Stevens. “Cool Jobs: Planet protectors.” Science News for Kids. June 21, 2012.

 

R. Kwok. “Weed wars.” Science News for Kids. Dec. 7, 2011.

 

E. Sohn. “A change in climate.” Science News for Kids. Nov. 30, 2004.

 

Teacher’s questions: Questions you can use in your classroom related to this article.