fossil fuels example and eval

Question 1

oil shale

Answer 1

china, large reserves,
invest in extraction, increase in secruity due to less imports
expensive, tech being developed still

Question 2

tar sand

Answer 2

canada, commercial scale, 40% of oil output, high energy input from bitumen
neg- expensive, enviro costs (clearance of taiga areas)

Question 3

shale

Answer 3

usa, 25% of gas supply
pos- enable to reach sources that were to difficult to drill, increase in secruity
neg-fraccidents, explosions