Answer:
Less people took planes. More security systems in airports.
Explanation:
A delta is formed.
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Answer:
Continental polar and maritime tropical.
Explanation:
- As these surface air mass are marked by high pressures and have cold temperatures, and the maritime air masses are cool, moist and unstable. Found along with the North American state.
- The continental is characterized by the dry winds, and the polar is hot air near the surface and the tropical air mass is warm and the arctic is extremely cold.
A flow resource is a resource which is neither renewable nor non-renewable, and must be used where it occurs and replenishes itself.
The core generates the magnetic field.
