The average
temparature of earth and sea is called as global warming.
The
concentration of corbon dioxide(co2) is directly proportional to the temparature that is more concetration of (co2) creates more temparature and vice versa.
about 4.5 billion years ago (co2) was 1000 times more concentrated as compared to today''s (co2) concentration.So temparature was also very very high.But gradully the (co2) has absorbed by the sea and it created carbonates like calcium corbonate(caco3). So the concentration of (co2) and temparature has also decreased.
About 100 million years ago the temparature was 10c to 15c more than today''s temparature. Because the concentration of (co2) was more than today.
In 17th century the concentration of (co2) was abrubtly decreased so temparature was also rised rapidly.
But in previous 300 yeras the
temarature of earth has chaged very quickly it rised and became about 15c average temarature of earth.
During 20th century the concentration level of (co2) has raised about 25% which caused the rise of temparature. It is predicted that in next 50 years the concentration of (co2) will
increase and will become about 50 % more than tody''s temparature. So 1.5c to 4.5c temparature will increase on earth. It is very very
dangrouse for us and for our lives.
(Reasone)
The smoke of cars, industries and fectories, and burning of wood, coal, petrole, diseal, engine oil etc are mostly dameging our atmosphere by generating more (co2).
(Our Duty)
So now it is our duty that we should do something for it. We should eliminate ther causes which are generating such types of dangrouse gases. And also the
gases of cars, fectories are dameging our OZONE which is most important for us as it is protecting us by the dangrouse rays coming from sun.
More abstracts about the Global Warming