First search this
https://www.google.com/search?q=nature&safe=strict&source=lnms
Then search this
https://www.google.com/search?safe=strict&biw=897&bih=527&tbm=isch&sa=1&q=pollution&oq=pollution&gs_l=img.1.0.0l10.527719.537162.0.540342.14.12.0.2.2.0.113.799.11j1.12.
0....0...1c.1.64.img..0.14.805.TSeLAfbUBH8
0....0...1c.1.64.img..0.14.805.TSeLAfbUBH8
Click this
Here is another website that me and my friends made!