Answer:
In 2000 about 90 percent of people lived in urban areas
Explanation:
Its a tue statement
1 cm on the map represents 10 km on the ground = 10 × 15 = 150 km.So,Then the normal length of the scale should be 15 cm.(150 km is a round number.)Then,15 cm × 60 km = 9000m².Therefore,60 km in map would be 9000m².
A main factor would be genetic traits your parents passed down
The answer is SPHERE. The center of the sphere should also be the center of the great circle. If this is not the case, wherein let's say the center of the sphere is not the center of the circle, then this would refer to a small circle. What goes through the center of the sphere is known as the great circle.
Answer: Ozone is considered as chief polluting gas.
Explanation:
The ozone is a ground level pollutant. It is a colorless gas. It causes irritation in the eyes and respiratory tract. It is one of the components of smog as it causes pollution in the atmosphere. It is produced by the two primary pollutants that are nitrogen oxides and volatile organic compounds when they react with the sunlight. The ozone makes the air irrespirable. It is the main cause of throat irritation, labored breath, pain in chest and also responsible for respiratory diseases. It reduces the body's ability against infection. The ozone depleting substances like aerosol, chlorofluorocarbon are widening the ozone depleting zone as halides present in these substances react with the ozone causing depletion. This allows the entry of harmful ultraviolet radiation penetrating the atmospheric layers.