On what issue did the proclamation influence and prepare the citizens for?

solving abolition for all slaves both in the North and South

Explanation:

The Emancipation Proclamation helped the United States get to total abolition of slavery. With the Emancipation Proclamation, the goal of the war also included freeing slaves to preserve the Union. Even though the Emancipation Proclamation first only freed slaves in more liberal states, near the end of the war, the Emancipation Proclamation influenced and prepared citizens to advocate and accept abolition for all slaves in both the North and South. Then, the 13th Amendment (that abolished slavery in the USA) was finally passed in December of 1865 as a result of this.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)