There is no chart or problem or picture to work out here but a tenth would look like this 12.<u>3</u>9 .
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.
Hope this helps:)
Answer:
Here's what I get
Explanation:
In the mid-1600s, the Brazilians were in the middle of a long war with the Dutch, whom they eventually defeated.
Brazil's settlement and economic development was largely on its lengthy coastline. As a result of the Dutch war, the country built coastal forts to protect its local exports of sugar and tobacco.
Many of the cities of Brazil developed close to the protection of the forts. For example, Rio de Janeiro is surrounded by three historic forts.
<span>The four classes were the Brahmins (priestly people), the Kshatriyas (also called Rajanyas, who were rulers, administrators and warriors), the Vaishyas (artisans, merchants, tradesmen and farmers), and Shudras (labouring classes).</span>
