The Yellowstone National Park is valuable to the US from many perspectives; protecting the environment, offering recreation, bringing in money from tourism etc.
Explanation:
The Yellowstone National Park is one of the most famous national parks in the world. The reason for that is that this national park has lot to offer; interesting physical features, geysers, beautiful forests, wildlife... This brings in lot of benefits with it.
The conservation of Yellowstone National Park is very important for conservation of the species living in it, as well as being very important for reintroduction of species that were extinct in the area, such as the wolf. Aesthetically it is beautiful, with all of its diversity in nature and land forms. From practical point of view, the people use it for relaxing, recreation, and it brings in lot of revenue from tourism.
Air pollution is when unwanted chemicals and poisonous substances are added to air, making it harmful to most organisms such as humans, plants, animals, etc... and even the atmosphere.
By different human activities, we add a lot
of smoke and dust into the air.
The biggest cause of air pollution is the use of fossil fuels.
These are mainly coal, petrol/diesel, and natural gas.
For example, if you have been in the car before and are stuck in traffic,
you will see fumes coming out of many vehicles.
These fumes are poisonous gasses that make the air polluted.
Answer:
(d) Brazil
Explanation:
On October 26, 1917, Brazil declares its decision to enter the First World War on the side of the Allied powers. One day before the U.S. declaration of war, a German U-boat sank the Brazilian merchant ship Parana as it sailed off the coast of France.
A tyrant would say that they are in charge, that there won't be a democracy, and would then possibly arrest or kill the people who are asking.
