Why did virtually all countries in the world agree to ban the use of CFCs by 2020 for developed countries and by 2030 for developing countries?
A) to prevent acid rain
B) to reduce global warming
C) because there are cheaper coolants that work better
D) because of overwhelming evidence that they destroy the ozone layer
E) because of overwhelming evidence that they cause smog in cities
Question 2
A gas threatening Earth's ozone layer is
A) sulfur dioxides.
B) chlorofluorocarbons .
C) the greenhouse effect.
D) photochemical smog.
E) nitrous oxide.
Rafflesia arnoldii, the world's biggest flower, lives as a parasite in Indonesian rain forests.
world as i would like it
Movement of Water in the World Ocean
The world’s longest glass-bottomed bridge
After multiple injections of a local anesthetic, the patient developed herpetic lesions.
World Aquaculture Production "لإنتاج العالمي لتربية الأحياء"