As has no doubt been pointed out elsewhere the manufacture of materials uses energy and releases carbon dioxide.

When properly incinerated it releases only carbon dioxide and water.

They contribute to the organic fraction of soil, and their growth releases carbon dioxide back into the atmosphere.

The burning of natural gas in electric generating turbines releases far less carbon dioxide into the air.

They release carbon dioxide, a waste product of the body's cells, as you breathe out.

Dead trees release carbon dioxide into the air.

They should be blue; if they are yellow, the range is releasing too much carbon dioxide.

Scientists believe this is because humans have been using large amounts of fossil fuels, which release carbon dioxide when they are burned.

As these fuels are burned, they release carbon dioxide and other pollutants.

After a while, the yeast broth will begin to bubble, releasing carbon dioxide.