References

"Carbon Dioxide"  Britannica.com INC, Copyright 1999-2000, Online,

http://www.britannica.com/bcom/eb/article/0/0,5716,20559+1+20249,00.html

Visited  4/14/00

"Helmont, Jan Baptista van," Microsoft® Encarta® Online Encyclopedia 2000

http://encarta.msn.com © 1997-2000 Microsoft Corporation. All rights reserved. Visited  4/29/00

"Carbon Dioxide"  Microsoft® Encarta® Online Encyclopedia 2000
                http://encarta.msn.com © 1997-2000 Microsoft Corporation. All rights reserved. Visited 5/1/00

"Center for the Study of Carbon Dioxide and Global Change"

http://www.co2science.org/  Co. 2000

Visited 4/19/00

Carbon Dioxide Pictures

Dick's Web Design Workshop

http://www.geocities.com/SiliconValley/Way/1036/ 

Visited 4/25/00