Our Environment : Complete Set of Questions

This set of questions contains all the possible concepts
which could be asked in the examination


What Happens When We Add Our Wastes to the Environment


Q.1  Define environment?

The biotic and abiotic factors which surrounds any living organism is considered as its environment. It can be generally defined as a community of organisms living in a particular environment with which they interact.

Q.2  Differentiate biodegradable and non-biodegradable substances with examples.

Q.3  Why are some wastes broken down by microorganisms while others remain unaffected?

The waste materials that we generate in our daily life are biodegradable or non- biodegradable. In our environment, microorganisms such as bacteria and fungi secrete enzymes. The enzymes are specific in their actions; specific enzymes are needed for the break-down of a particular substance. Because of this, many human- made substances like plastics, glass etc will not be broken down by the action of bacteria and other saprophytes. These materials will be acted upon by physical processes like heat and pressure, but under the ambient conditions found in our environment; these persist for a long time.

Q.4  Will the generation of only biodegradable wastes have any impact on the environment?

If all the waste we generate is biodegradable, this would also have an impact on the environment but most of the impacts would be positive. After decomposition, the biodegradable substance produces different raw materials which are sent back to the ecosystem. The solid remains would add to the humus content of soil.

There can be some negative impacts; like obnoxious smell which is created during the process of decomposition. There can also be a possibility of sparking an epidemic if the waste is dumped near a residential area or is allowed to contaminate the water bodies. So, it is not the biodegradable waste which is going to create the problem, rather the way we dispose it.


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