It is made by reaction of nitrogen dioxide with water.

This produces nitrogen dioxide, so it should be done where the person can get fresh air.

These people are also subject to 41% higher concentrations of nitrogen dioxide from transport and industry than the average.

A man couldn't last that long on Mars, because the water in his body would react with the nitrogen dioxide around him.

The presence of nitrogen dioxide is necessary for the reaction to proceed.

Two of the four have dirty nitrogen dioxide at the bottoms.

Levels of nitrogen dioxide fell 7 percent during the same period, but they are now inching up again.

Near the sun the sky is like fresh blood, tinged by nitrogen dioxide.

Among these are low levels of nitrogen dioxide and carbon monoxide.

Ground was frozen with nitrogen dioxide to stop the foundations from failing.