converting sunlight into electricity looking for new coal reserves finding reservoirs that contain oil converting forests into farmland
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which topic area would be the best to research to find ways of reducing environmental problems caused by humans?
Possibilities:
- converting sunlight into electricity
- looking for new coal reserves
- finding reservoirs that contain oil
- converting forests into farmland

converting sunlight into electricity