Tree planting, because it will fight it by creating more plants. :) hope this helps!
Answer:
B. Karst regions and carbonate rock outcrops occur on every continent except Antarctica.
Explanation:
Karst is an area made up of limestone. Antarctica's geology make its more complicated for this outcrops occurance, there are several karst regions all over the world such as:
Ankarana Reserve, Madagascar (Africa)
South China Karst, World Heritage Site (Asia)
South Harz and Kyffhaeuser Gypsum Karst, Germany (Europe)
Illinois Caverns State Natural Area and Illinois Sinkhole Plain in Monroe County (North America)
Los Haitises National Park, Dominican Republic (Central America)
The Sierra de San Luis in Falcón State, Venezuela (South America)
Jenolan Caves, New South Wales (Oceania)
I don’t know I’m just answering this so I can ask more questions.
The tribal and national identity in Africa are a big problem. Lots of the people from certain tribes identify them selves as by the tribal identity first, and secondary by the national identity. The problem emerges when one group of people do not recognize the other group of people as part of the national identity because they differ in culture, religion, language. So this very often creates conflicts that last for years, on multiple occasions even genocides have been performed, and some tribes do not allow members of other rival tribes on the territory where they are dominant. So all in all, the national identity suffers, the people suffer, and the governments haven't been able to find a solution yet.