greenhouse effect & global warming by rana m kashif (m.sc. hons.) agronomy
TRANSCRIPT
PRESENTATION ON THE TOPIC:GREENHOUSE EFFECT &
GLOBAL WARMINGBY
RANA MUHAMMAD KASHIFB.Ed. In-service
GCET, NAROWAL,UNIVERSITY OF EDUCATION,
LAHORE, PAKISTAN2016
Introduction
Greenhouse Effect Greenhouse gases Global Warming Causes Consequences Control Measures
The Greenhouse Effect
Who is responsible?
Natural Causes
Some claim the sun is getting hotter. Also, the earth goes through natural cycles of climate change.
Human Causes
Carbon dioxide (CO2) exhaust from cars and power plants.
Methane gas from waste
Deforestation
Consequences of global warming
Catastrophic weather such as hurricanes will increase.
Melting polar icecaps will raise ocean levels; the Arctic Ocean could be ice free in summer by 2050.
Heat waves, droughts, and wildfires will be more frequent.
Up to 300,000 people a year will die – partly from the spread of tropical diseases.
More than a million species worldwide could be extinct by 2050.
Endangered
Global sea levels could rise by more than 20 feet, devastating coastal areas
worldwide.
The future of our coastal cities?
Is it already too late?