Answer:
The correct answer is D
Explanation:
During the 20th century, there was an increasing interest in the environment. The impact of human activity on the environment has been observed locally since centuries. Pollution of canals and chimneys in crowded urban areas etc were all causes of concern.
However, with a better understanding of our earth and increase in Medical knowledge of the 20th century, we could observe how our activities were having a global impact on the ozone layer and the melting ice caps.
Evidence was also provided on how human health was affected by this. The use of fossil fuels was not only directly damaging to the atmosphere, it was also dangerous for humans e.g. carbon monoxide produced by car emissions.
Answer:
positive: decreases the amount of surplus goods
negative: cultural differences, language barriers, shipping customs
Explanation:
A wild plant growing where it is not wanted and in competition with cultivated plants.
Answer:
1km
Explanation:
A scale of 1:25,000 means that 1 meter on the map equals 25,000 meters on the ground.
So,
Converting 4cm to meter;
4cm/100 = 0.04m
If;
1m = 25,000m
0.04m = ?
25,000 * 0.04 = 1000m
This is to avoid potential turbulent air below. Hope this helps!
