Fill in the blanks in the equations and statements below.

Carbon monoxide in the troposphere can be removed in three ways.

1. By reaction in the gas phase, for example with hydroxyl radicals produced by the photolysis of molecules.

CO +  -->  CO₂ +

2. By bacteria and fungi in the soil.

2CO + O₂ --> 

4CO + 2H₂O  -->  + 3CO₂

3. By plants.

CO + + plant leaves  -->  amino acids NH₂CH(R)

CO + plant leaves (at night)  -->