Which one of the following pairs is mismatched?

Solar energy is not responsible for green house effect instead it is a source of energy for the plants and animals. Green plants prepare their food by the use of this solar energy. $\mathrm{CO}_2$ gas is mainly responsible for green house effect. Excess of this gas forms a thick layer around the earth and prevents re-radiation of entering sun rays to atmosphere. Thus functions like the glass panels of a green house (or the glass windows of a motor car). This is so called green house effect.