1. What does destruction refer?

96. What causes acid rains?
A) the washing of the mineral in the land
B) the increase in the amount of the amount in the land
C) all options are correct
D) the degradation of forests
E) the pollution of land
97. As a strategy for fighting crop pests, chemical pesticides have many drawbacks, 
except:
A) Negative health effects to non-target organisms
B) Causing non-pest species to become pests
C) Pest resistance

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D) Increases of natural predators
E) Negative health effects to humans
98. Choose positive interaction.
A) Parasitism
B) Competition
C) Commensalism
D) Antibiosis
E) Predation
99. Find the definition for reproductive capacity of the territory?
A) the ability to reproduce natural resources
B) ability to resist anthropogenic impact
C) the ability of biogeocenoses to heal themselves
D) the ability of ecosystems to maintain balance
E) the ability to recover after technogenic impact
100. Guano deposits are the major source of:
A) Phosphorus
B) Oxygen
C) Sulfur
D) Nitrogen
E) Carbon
101. What groups are depleted resources divided into?
A) renewable, non-renewable, inexhaustible
B) depleted, renewable, inexhaustible
C) recoverable, relatively recoverable, non-recoverable
D) depleted, inexhaustible, non-renewable
E) renewable, relatively renewable, inexhaustible
102. Which concept is about the amount of greenhouse gas we pump into the 
atmosphere each year by burning fossil fuels?
A) Mass balance
B) Residence time
C) Standing stock
D) Negative and positive feedback
E) Material flux rate
103. Today, soil degradation induced by human activities afflicts nearly ______% of