In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
There is nothing wrong with earning money by selling pictures online.
In his response to your question, Sheikh Ahmad Kutty, a senior lecturer and Islamic scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
You are merely earning your living through honest work – provided, of course, the pictures are in no way lewd or promoting vices or encouraging nudity.
So, if you are taking pictures of nature and landscapes, there is nothing questionable about it.
Almighty Allah knows best.