Global warming refers to the long-term rise in Earth's temperatures caused by increased greenhouse gas emissions from human activities like burning fossil fuels. It was first predicted in 1896 by Swedish scientist Svante Arrhenius and the effects of increased carbon dioxide on global warming were connected by Guy Callendar in 1938. Global warming can have serious effects like rising sea levels that cause loss of coastal land, changes in weather patterns leading to more extreme events like droughts and floods, and threats to biodiversity and human health from impacts to air and water quality and the spread of diseases. Individual actions like changing light bulbs, driving less, recycling more, and adjusting thermostats can help reduce the effects of global warming.

1. Global
Warming
By: J.D. Rajapakse

2. Introduction to
Global Warming
O According to Google global warming
is:
O 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

3. When did the global warming
started?
O The instrumental temperature record
shows the signal of rising
temperatures emerged in the tropical
ocean in about the 1950s. Today's
study uses the extra information
captured in the proxy record to trace
the start of the warming back a full
120 years, to the 1830s.

4. Who discovered
global warming?
O In 1896, a seminal paper by Swedish scientist
Svante Arrhenius first predicted that changes
in atmospheric carbon dioxide levels could
substantially alter the surface temperature
through the greenhouse effect. In 1938, Guy
Callendar connected carbon dioxide increases
in Earth's atmosphere to global warming.

5. What are the harmful effects
of global warming?
O Global warming can result in many
serious alterations to the environment,
eventually impacting human health. It can
also cause a rise in sea level, leading to
the loss of coastal land, a change in
precipitation patterns, increased risks
of droughts and floods, and threats to
biodiversity.

6. What is global warming and
how is it caused?
O Global warming is an aspect of climate
change, referring to the long-term rise
of the planet's temperatures. It is
caused by increased concentrations of
greenhouse gases in the atmosphere,
mainly from human activities such as
burning fossil fuels, and farming.

7. How is global warming
affecting us?
O Climate change can also impact human
health by worsening air and water quality,
increasing the spread of certain diseases,
and altering the frequency or intensity of
extreme weather events. Rising sea level
threatens coastal communities and
ecosystems

8. How can global warming be
reduced?
O Change a light. Replacing one regular light
bulb with a compact fluorescent light bulb will
save 150 pounds of carbon dioxide a year.
O Drive less. ...
O Recycle more. ...
O Check your tires. ...
O Use less hot water. ...
O Avoid products with a lot of packaging. ...
O Adjust your thermostat. ...
O Plant a tree.

9. How does global warming
affect human life?
O Climate change affects the social and
environmental determinants of health –
clean air, safe drinking water, sufficient
food and secure shelter. Between 2030
and 2050, climate change is expected to
cause approximately 250 000 additional
deaths per year, from malnutrition,
malaria, diarrhea and heat stress.

10. T h a n k
Y o u !