Answer :

1)  Jal He To Kal He,     Jal Nahi To Kuch Nahi.

2)Tarakki Ke Sapne Adore
  Prikriti Ki Raksha Se Honge Poore!

3)  

1. Pollution he mahamari -ise daharti ko bachaio.
2. bund bund pani mein jaan hei- ek ek bund bachaiye.
3. gyan he tarakki ka sopan- gyan sabko bantiye.