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;
6 Cards in this Set
- Front
- Back
|
What is the origin of coal? |
Ancient decaying plants under great heat and pressure |
|
|
What is the origin of petroleum / natural gases? |
Ancient decaying microscopic marine organisms under great heat and pressure |
|
|
When is ozone bad? |
When it’s in smog near Earth’s surface |
|
|
Where is the ozone layer located? |
Stratosphere |
|
|
What is the main use of biomass fuels today? |
Transportation |
|
|
Why are CFC's bad? |
They destroy ozone |
