To combat the threat of tropical diseases such as malaria and yellow fever, the United States decided to use new measures to eradicate the disease before the construction of the Panama Canal. Under the leadership of Colonel William Crawford Gorgas, many changes were made. When it was discovered that mosquitoes were the source of the disease, Gorgas who was appointed as the head of hospital and sanitation, he made sure that containers with stagnant water were removed because mosquitoes lay their eggs there. He also built domestic water systems to eliminate the need to collect rain water. Prophylactic Quinine was supplied to the people in the area and fumigation and oiling of streams were launched. Those who were sick were quarantined and workers would sleep in screened structures so that mosquitoes would not be able to bite them. These programs resulted in the successful elimination of tropical diseases in the area and the health of workers improved.
I believe that was B. Marcus Garvey.
The "Back to Africa" movement was created in order to inspire black people to return to their roots and their original African culture. Garvey believed that black people had a lot of difficulties in a foreign country so he wanted them to be free and feel safe at home.
Also called "H-bomb" or "fusion bomb", the hydrogen bomb is the most powerful explosive invented by man. Its force can reach 50 times that of an atomic bomb like those that were dropped on Japan and the reaction is the same that occurs spontaneously inside stars like the sun.
In contrast to what happens in nuclear fission, when heavy uranium atoms "break" releasing large amounts of energy, in nuclear fusion the hydrogen atoms (deuterium and tritium) come together to release energy.
The difference is that while nuclear fission releases about 10% of the energy contained in the nucleus of atoms, fusion can release about 40% of that energy.
