l. Fertilizer II. Insecticides III. Sewage IV. Crude oil V. Sulphur dioxide. The atmosphere can polluted by

The diagram below is an illustration of an ecological instrument. Study it an answer the question below;

When the instrument is in use, it is usually? 

Soil with the finest texture is?

Which of the following is NOT regarded as a pollutant on land or in the air?

A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?