Radioactive pollution is the increase of radiation levels beyond their natural capacity. This is mainly due to human activities. It is estimated that about 20% of radiation exposure is due to human activities. 

Effects of radioactive pollution include genetic mutation, soil infertility and cell destruction. Example of radioactive pollution is the Chernobyl incident when a fire in an nuclear facility polluted the entirety of Chernobyl, rendering it dangerous for human habitation

For more relevant articles refer to the links given below:

• UPSC Environment and Ecology Questions
• Conservation of Biodiversity
• UPSC Environment and Ecology