Natalie actividad 7-abril-14 -- predictions
Published on: Mar 3, 2016
Transcripts - Natalie actividad 7-abril-14 -- predictions
Available on: http://www.ghgonline.org/predictions.htm
1. Read the text. What is going to happen because of the Global warming?
The rapid increase in carbon dioxide emissions observed during the last
250 years is expected to continue for several decades to come. Various
scenarios have been examined, depending on factors like fuel use and
efficiency. Even the best case scenario predicts further increases in carbon
dioxide emissions until about 2040.
Many of the scenarios indicate that by the middle of the 21st century
emissions of carbon dioxide should at least start to level off, though some
predict increase in emissions throughout this century.
Though the different scenarios predict a wide range of trends in carbon
dioxide emissions, the predicted net effect on atmospheric carbon dioxide
concentrations in the future is fairly consistent.
All predict further increase in carbon dioxide concentrations by the end of
the is century, with some of the scenarios predicting a doubling or even
trebling of today's levels of carbon dioxide.
If the predicted increases in greenhouse gas concentrations are then
translated into temperature changes, a global temperature increase of
between 1 and 5.5 degrees centigrade is predicted for 2100.
The average predicted temperature increase over the next 100 years is around 3 degrees centigrade. This
compares to an increase of about 1 degree centigrade due to previous man-made greenhouse gas emissions.
The large amount of variation between predictions of the different scenarios underlines the complexity involved
in making such predictions and the large amount of uncertainty inherent in climate change models.
A common feature of global warming stories in the media is sea level rise. Sea level rise, through the thermal
expansion of water and ice melt around the world, poses a potentially
very serious threat to millions of people.
Like temperature change, predictions vary widely, from a low of 20 cm
to a high of around 60 cm.
The impact of such sea level rise is likely to be greatest in those low
lying countries, like Bangladesh, least able to adapt to the sea level rise
by building expensive sea defences.
2. Discuss the next questions
What is the main problem that causes Global warming?
What might happen with the global temperature?
What is going to happen with the sea level rise?
What suggestions do you think people should do?
What are you doing to avoid this?