A primary pollutant is an air pollutant emitted directly from a source.
A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.
Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and <em><u>acid rain</u></em>, which is formed when sulfur dioxide or nitrogen oxides react with water.
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Evaporated water became rain . climate depend on Earth rotation and weather forecast condition
<h2>
The End of Trans-Saharan Trade Routes:</h2>
Explanation:
The factors that led to the end of trans-Saharan trade routes are:
- Civil unrest due to collapse of the Songhay Empire, the Timbuktu, by the Morracans in 1591
- The extreme desert conditions like extreme climates, excessive heat, lack of water and food etc made the travel logistics very tough. This made people opt for other transport systems
- Huge advancements made in maritime travel
- Exploration of West African trade routes
- Economic, political and social changes which led to the end of trans-Saharan trade routes
<u>slumping</u>:<span>collapse
</span><span><u>mudslide :</u>Landslide high speed circulating a mixture of water, mud, silt <span>and clay
<u>avalanches</u> :</span></span><span>detachment and sliding of a large amount of snow along a mountain.</span>
Answer:
The podcast addresses secondary risks in the aftermath of an earthquake. These risks include damaged structures, the disruption of rivers due to debris buildup, and changes in groundwater. The podcast also points out that landslides are a common secondary effect of earthquakes. The podcast can help inform Japanese leaders of such risks so that they might successfully develop policies and procedures for handling future earthquakes and the recovery from their ensuing damage.
Explanation: Exact answer from Tutorial
