What is associated with: about 300000 people in africa suffer from sleeping sickness spread by the tsetse variety of this insect?

What is associated with: about 3000 bs the sumerians invented this writing system which used triangular marks? What is associated with: about 3000 miles wide its name is from the arabic for desert? What is associated with: about 300000 passenger cars cr? What is associated with: about 300000 passenger cars zw? Based on the clue 'about 34 of sri lankans speak sinhala about 14 sp...', what is the answer? Based on the clue 'about 34 of the people of singapore speak this asi...', what is the answer? Based on the clue 'about 34 of us plantings of this palm fruit are of...', what is the answer? Based on the clue 'about 35 of bhutans people are ethnically related ...', what is the answer?