| A | B |
|---|
| Renewable resources | fish and trees |
| Non-renewable resources | metals, mineral, fossil fuels |
| A fluorescent light bulb uses | 1/4 of the electricity of an incandescent bulb |
| Our coal reserves should last | for 100 years |
| Four main types of coal | lignite, sub-bituminous, bituminous, anthracite |
| Steel produced from scrap reduces | air pollution by 85% |
| The rate at which we use resources | depends on population size, technology and lifestyle |
| Renwable resources can last | indefinitely if well managed |
| Lignite | lowest carbon content |
| Sub-bituminous | between lignite and bituminous |
| Bituminous | burns with a smoky, yellowish flame |
| Anthracite | a black, hard coal |
