Answer:
1.Afforestation- This means more trees should be planted as these trees are important in purification of the atmosphere and makes clean and more volume of oxygen available.
2. Pollution should be reduced at every cost in order to make all the inhabitants of the environment perform optimally and decreasing risk of diseases and death.
3. Natural resources should be saved and not depleted in a rapid form or way.
4. Water should be conserved and used efficiently to prevent periods of droughts which leads to famine,hunger and death.
 
        
             
        
        
        
The major concern of scientists who left Nazi Germany for the states before ww2 was that a new Nazi would heavily persecute the Jews ,many of whom held positions in the realm of science
        
             
        
        
        
Answer:
Although Leopold II established Belgium as a colonial power in Africa, he is best known for the widespread atrocities that were carried out under his rule, as a result of which as many as 10 million people died in the Congo Free State.
 
        
                    
             
        
        
        
Slaves from africa where brought to the americas to mine and work in farms