Main cause of ozone holes and its depletion is
a) foam-blowing agents
b) propellants
c) halocarbon refrigerants
d) all of these
Climate Change(آب وہوا میں تبدیلی):
Which of the following are the long-term change in the average weather of a particular region?
a) weather change
b) climate change
c) both a & b
d) none of these
According to United Nation Framework Convention on Climate Change (UNFCCC), climate changes occurs………due to human activities.
a) directly
b) indirectly
c) directly or indirectly
d) suddenly
Which of the following are the main cause of climate change?
a) deforestation
b) pollution
c) both a & b
d) none of these
Greenhouse Effect and Global Warming
(گرین ہاوس اثر اور عالمی حدّت):
