Global Warming: Global warming is defined as the increase of the
average temperature on Earth. As the Earth is getting hotter,
disasters like hurricanes, droughts and floods are getting more
frequent. Cause of global warming: Almost 100% of the observed
temperature increase over the last 50 years has been due to the
increase in the atmosphere of greenhouse gas concentrations like
water vapor, carbon dioxide (CO2), methane and ozone. Greenhouse
gases are t hose gases that contribute to the greenhouse effect
(see below). The largest contributing source of greenhouse gas
is the burning of fossil fuels leading to the emission of carbon
dioxide. The greenhouse effect: When sunlight reaches Earth’s
surface some is absorbed and warms the earth and most of the
rest is radiated back to the atmosphere at a longer wavelength
than the sun light. Some of these longer wavelengths are
absorbed by greenhouse gases in the atmosphere before they are
lost to space. The absorption of this long wave radiant energy
warms the atmos