Your site is limited to Kerala, India. Only Indian visitors will land on your site. If any traffic comes from abroad, they simple visit and close the site without any ad clicks. I think your niche selection is not good for more adsense revenue.
adsense is not like it was before,so this kind of earning is normal,there is nothing you can do about it
25 Percent of my visitors are from abroad. US, UK, and middle east. All those keralians who stay in those countries looks for the used cars in my website
The keywords you have targetted are not so good IMO.. They are region restricted and that too India.. You would hardly get 10 cents for a click on ads.. Try to concentrate of different keywords.. Take help of google keyword tools to know about searches and CPC of that keyword. Thanks
No, Most impression and also should be globally and your content should be unique then your EARNINGS will increase
How come your getting so huge traffic and no clicks... have u placed ads properly on your website..? what is the main traffic source of your website??