here are some areas to focus your research on- you are not limited to these, this is just to help get you started: no more than 3 per source!
conservation
land management
erosion
fertilizers
herbicides
pesticides
GMO's
mining practices
climate change
fracking
solar power
wind power
Hydroelectric power
composting
watersheds
over fishing
by-catch
water treatment
CAFO's
deforestation
e- waste
radiation exposure
sewage treatment
el- nino
hurricanes/ climate change
invasive species
Toxins of any kind
bioremediation