11956761
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
over 6 years ago
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| Question | Answer |
| What's the difference between non-point and point pollution? | Non-point - wide input and impact over a large area Point - single identifiable source |
| How can you measure the effect of pollution? | LD50 LC |
| LD50 | Single dose of a chemical test, when fed/applied dermally kills 50% of that group |
| LC | Lethal concentration concentration of pollutant in air/water that will kill half of all test animals with a single exposure |
| How may the effects of pollutants differ? | Additive antagonistic Synergistic |
| Additive | Add-on effect |
| Antagonistic effect | effect of one pollutant may be negated or reduced by impact of another |
| Synergistic effect | Combine in a way that the enviro impact is far greater than if they were just additive |
| What sort of sources of pollution exist? (4) | Point source Multi-point source Seeping (fertiliser run-off) Spreading (volatiles in air) |
| What's the difference between acute and chronic pollution? | Acute is usually a point-source or one accident, afterwards an ecosystem can being to recover Chronic pollution is a constant low-level input into that environment, occurs either continuously or in frequent pulses. Environment is under light stress |
| Why is chronic pollution arguably worse | The effect is cumulative, and the ecosystem doesn't get a chance to recover. |
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