1.   And they produce oxygen which animals need to breathe, and which helps to replace that lost by burning fossil fuels.

2.   However, after dark the plants and algae stop producing oxygen and instead use it to respire.

3.   Rainforests absorb carbon dioxide and produce the oxygen essential for all life, including our own.

4.   Plants produce oxygen.

5.   Plants and trees filter carbon dioxide out of the air and produce oxygen.

6.   Aquatic plants, which absorb fertilizer and produce oxygen, could help in the future, Strom said.

7.   As in other coastal areas, these rich stores of nutrients feed algal populations which explode during the summer, producing oxygen, as all plants do.

8.   A damaged oxygen generator could allow heat to escape, while producing oxygen that could feed a fire.

9.   A prototype device for producing oxygen aboard the space station lost partial function.

10.   Even after the expiration date, full canisters contain hazardous chemicals that, when activated by pin triggers, heat up and produce oxygen.