Which of the following is not a heavy industry?(Environmental chemistry,Components of Environment)

Explanation

This option is correct. All three options (a) iron, (b) fertilizer, and (c) paper can be considered heavy industries, as they involve large-scale production processes and infrastructure. Therefore, there isn't an option that is not a heavy industry among the given choices.Let's examine why other options are incorrect.(a) Iron - This is considered a heavy industry because it involves the extraction and processing of raw materials like iron ore, which are typically heavy and require significant machinery and infrastructure for mining, refining, and manufacturing steel products.(b) Fertilizer - Fertilizer production can be considered a heavy industry due to the large-scale chemical processes involved in manufacturing various types of fertilizers, which often require substantial energy inputs and industrial facilities.(c) Paper - Paper production is generally not classified as a heavy industry. While it involves manufacturing processes, including pulping, pressing, and drying, these processes typically do not require as much heavy machinery or energy-intensive operations as those found in industries like iron or fertilizer production.(Environmental chemistry,Components of Environment)