Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
4 Cards in this Set
- Front
- Back
|
Explain the relationship between rises in concentration of atmospheric carbon dioxide, methane and oxides of nitrogen and the enhanced greenhouse effect
|
Carbon dioxide, CO2: mainly from combustion of fossil fuels (56%).
Methane, CH4: mainly from livestock farming (18%). 20 times more potent as greenhouse gas than CO2. Nitrous oxide, N20: Agriculture, sewage and manure management (64%) *Greenhouse is natural and equalizes the temperature on earth. The problem is the enhances greenhouse effect due to human compact. |
|
|
Outline the precautionary principle
|
The precautionary principle: "Prevention is better than cure"
If you suspect that a disaster is going to happen, try to deal with it now until it's too late even though the proofs are not 100%. The ones responsible must prove it will not do harm before proceeding. |
|
|
Evaluate the precautionary principle as a justification for strong action in response to the threats posed by the enhanced greenhouse effect
|
There's strong evidence that greenhouse gases are causing global warming. This is worrying since global warming has so many consequences on ecosystems. If nothing is done then by the time we realize it, it will be too late and result in catastrophe. So even if there's no proof for it, the strong evidence suggesting it is something we can't ignore for these reasons, principle should be followed.
|
|
|
Outline the consequences of a global temperature rid on arctic ecosystems
|
-Ice melting, sea levels will rise
-Shorter winters -Change of local weather, more/less precipitation -New species may arrive when it becomes warmer -Pests and diseases may become quite common -Thawing of permafrost |
