Which of the following is included in edaphic factors?

Explain some harmful effects of agricultural practices on the environment.

What are the two main components of our environment?

Select the mismatched pair in the following and correct it.
$(a)$ Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain
$(b)$ Ecosystem — Biotic components of environment
$(c)$ Aquarium — $A$ man-made ecosystem
$(d)$ Parasites — Organisms which obtain food from other living organisms

What is the estimated amount of waste (in kg) generated by each person in an urban area every day?

Mention the differences between food habits of organisms belonging to the first and third trophic level. Give one example of each of them.