Narrator: Global warming may not
be out of control. This is Science Today. Thanks
to industry and deforestation, we're pumping more
and more carbon dioxide into the atmosphere. CO2
is a greenhouse gas, and some scientists fear runaway
global warming as a result. But environmental scientist
Ron Amundson of the University of California, Berkeley
says the news isn't all bad.
Amundson: Hopefully this is not completely a runaway problem or cycle, because there are other parts of the world that are responding to this.
Narrator: Plant growth, for example, is stimulated by increased CO2 levels -- and plants absorb CO2.
Amundson: So they may in turn provide a negative feedback in the sense that their growth rates will increase, converting some of this CO2 that we're producing back into plant material.
Narrator: Plus there are the oceans, where some minerals can absorb extra carbon dioxide.
Amundson: And then also there are biological processes in the ocean that can absorb some of the CO2.
Narrator: But Amundson says that's no reason not to reduce CO2 in the first place. For Science Today, I'm Steve Tokar.