respire

"Through previous work, we knew that Spartina alterniflora has sulfur bacteria in its roots and that there are two types: sulfur-oxidizing bacteria, which use sulfide as an energy source, and sulfate reducers, which respire sulfate and produce sulfide, a known toxin for plants," Rolando said.

Tiny pores on a leaf’s underside are arranged to take in carbon dioxide and respire water, allowing the plant to transform sunlight into energy.

On average, pregnant women suffer twice as many bites, as they respire 20% more carbon dioxide, and have a marginally elevated body temperature.

In fact, Mr. Mann tweeted, even 6% would probably be too high, because “plants both photosynthesize and respire.”

That oxygen was toxic to many species, but over time – as we well know – natural selection managed to come up with variants that were not only happy being bathed in oxygen but could respire it and in doing so jump onto a metabolic express train.