The level of oxygen and carbon dioxide is maintained by……….
a) photosynthesis
b) respiration
c) decomposition
d) both a and b
Global Warming:
Global warming is the long-term heating of Earth's surface observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere. This term is not interchangeable with the term "climate change."
The increase in
average…….is called global warming.
a) humidity
b) pressure
c) temperature
d)
acidity
The global
temperature has increased by…… 0C in the last 100 years.
a) 1
b) 2
c) 5
d) 10
Which of the following population is a major contributor to global warming?
a) plants
b) animals
c) human
d) insects
Which of the following is/are the leading cause/s of global warming?
a) combustion of fossil fuels
b) deforestation
c) plantation of new forests
d) both a and b
