- The large coniferous forest areas in the northern hemisphere between the latitudes of 50
- Large areas of boreal forest are found in Scandinavia, Siberia and Northern America
- Both (a) & (b)
- None of these
- The part of the earth that supports life and consists of the soil, oceans
- The waterways and the atmosphere upto 15 km above the earth's surface
- Both (a) & (b)
- None of these
- The north polar regions but it has also become used to denote the territory lying within the Arctic Circle
- The landscape, climate and plant and animal life found in those regions
- Both (a) & (b)
- None of these
- A type of pollution which washes out of the atmosphere as dilute sulphuric and nitric acids
- It tends to be a regional rather than a global phenomenon linked to particular industrial activities and meteorological conditions
- Both (a) & (b)
- None of these
- The process by which plants and animals become accustomed to unusual environmental conditions
- That they are able to live and produce
- Both (a) & (b)
- None of these
- The name given to the first report of changes in the amount of ozone
- The upper layers of the atmosphere over the south pole
- Both (a) & (b)
- None of these
- Fertilizer: Manure: any substance applied to soil fertility and increase plant growth and yield, these may be organic in organic or of bio-origin
- Organic fertilizers: prepared from plant residues (cotton seedcake, groundnut cake etc.)
- Both (a) & (b)
- None of these
- Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
- On the basis of the amount and their relative harmfulness or toxicity
- Both (a) & (b)
- None of these
- An undesirable change in physical, chemical or biological characteristics of air, water or land that may
- Will harmfully affect human life, directly or indirectly
- Both (a) & (b)
- None of these
- To society of American forests (SAF) is an eco-system characterized by a more or less dense and extensive tree cover
- A plant community with predominance of trees and other woody vegetation, growing more or less closely together
- Both (a) & (b)
- None of these
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