翻译、O(∩_∩)O谢谢

Question

The world is not only hungry, it will also be thirsty for water. About 97 % of water on the earth is sea water, or salt water. Man can only drink or use the other 3 % of the fresh water（淡水）which comes from rivers，lakes and underground. On the other hand, because the number of people in the world is becoming larger and larger, more and more fresh water is needed. So water shortage becomes a big problem.
　　How can we work out this problem? Scientists have found some ways to turn salt water into fresh water. One important way is to boil（使达到沸点）sea water with high heat until vapor（蒸汽）rises, leaving the salt. In this way, a lot of fresh water can be made quickly.
　　But heating is not the only way to get fresh water. Other ways are tried, for example, digging deep wells, keeping rain water and preventing rivers from being polluted.
　　Which way is the best? To get the most fresh water for the least money is the best.
问题解答一下、最好还可以翻译、O(∩_∩)O谢谢
Water shortage becomes a big problem,doesn't it?
_______________,_________________
What ways have scientists found?
___________________________
Are they hard ways to dig deep well,to keep raon water or prevent rivers from being polluted?
__________________________

Answer 1

世界不仅是饿了，它也渴了。地球上约97％的水是的海水，只有3%是咸水。人只能饮用或使用的其他3％的食用水（淡水）都在河流，湖泊和地下。另一方面，因为世界上的人数量越来越多，所以也需要越来越多的水。因此，水资源短缺成为一个大问题。我们如何去解决这个问题呢？科学家们已经发现了一些方法来使咸水变成淡水。重要途径之一是蒸溜法把咸水煮沸（使水达到沸点）经过高温（蒸汽）的蒸溜水，直到把盐都挥发。这样得到大量的淡水，效率高。但是蒸溜法不是唯一获得淡水的方法。其他方法也试过了，例如，挖掘深水井，使用雨水，防止河流受污染。哪种方法最好？最少的钱得到最新鲜的水是最好的。
_______________,_________________什么方法，科学家们发现？___________________________是他们辛苦的方式，挖深井，以保持raon水或防止受污染的河流吗？__________________________

Answer 2

Water shortage becomes a big problem,doesn't it? 水短缺成为一个很大的问题，不是吗？

Yes, water shortage has became a big problem according to the short passage

What ways have scientists found? 科学家发现了什么办法？

One way that scientists use is to boil sea water with high heat until vaporrises,the other ways such digging deep wells, keeping rain water and preventing rivers from being polluted are also tried by scientists
Are they hard ways to dig deep well,to keep raon water or prevent rivers from being polluted?
最后一个问题好像几个单词拼写错了，Are they hard ways?