I believe that they used higher tec on the dry soil, it became a problem where the air had so much dirt in it that the dust bowl hapend. this is what i learned, hopefully this helps
"Planting trees throughout Sahel" is the one action among the following actions given in the question that would be the most effective long-term solution to fighting desertification in the Sahel.
The correct answer is D.
Lech Walesa (born in 1943) is a Polish politician and labour activist. He founded and leaded <em>Solidarity</em> the first free labor union in the Soviet bloc. He was awarded the Nobel Prize in 1983 and became president of Poland in 1990 until 1995.
The reasons why he was awarded the Nobel Prize was because he developed mechanisms for peaceful resolution of labor issues in his country. He established networks for negotiations and cooperation between the government and the unions, specifically his organization called <em><u>Solidarity</u></em>. He attempted to solve problems through peaceful initiatives, while surrounded by a world in constant tension due to the Cold War scenario. His behaviour set a model to be followed and this is why the committee decided to give him the award.
