Question

Any three problems caused when an area is depopulated?
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Answer 1

Answer:

Answer:

Depopulation' refers to a process in which the population density of an area decreases steadily over time. Increased human population is certainly a threat to environmental sustainability, but local phenomena of depopulation may be seen also as threats to local environmental sustainability.

.1) It can actually increase negative environmental pressures on biodiverse agricultural production through increased soil erosion and invasions by pests and weeds, leading to reduction of biodiversity

2)depopulation also transforms territory, sometimes leading to a loss of valued cultural landscapes

3)ecological impacts includes soil degradation

Explanation:

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Answer 2

Explanation:

using l=

A

P

, where P= radiation power

⇒P=l×A=

tλ

nhc

=lA⇒

t

n

=

hc

lAλ

Hence the number of photons entering per second

eye(

t

n

)=

6.6×10

−34

×3×10

8

10

−10

×10

−6

×5.6×10

−7

=300