GLOBAL WARMING
The global average air temperature near the Earth's surface rose 0.74+-0.18 degrees Celsius during the last 100 years. The Intergovernmental Panel on Climate Change (IPCC) concludes, " Most of the observed increase in globally averaged temperatures since the mid-20Th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations" via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-indusrtial times to 1950 and a small cooling effect from 1950 onward.
These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. However, a few individual scientists disagree with some of the main conclusions of the IPCC.
Causes
Earth's climate changes in response to external forcing, including variations in its orbit around the sun(orbit forcing) volcanic eruption, and atmospheric greenhouse gas concentrations. The detailed causes of the resent warming remain an active field of research, but the scientific consensus identifies elevated levels of greenhouse gases due to human activity as the main influence. This attribution is clearest for the most recent 50 years, for which the most detailed data are available.
In contrast to the scientific consensus that resent warming is mainly attributable to elevated levels of greenhouse gases, other hypotheses have been suggested to explain the observed increase in mean global temperature. One such hypothesis proposes that warming may be the result of variation in solar activity.
To solve these problems..
There are lots of reasons of global warming but many reasons are in our life. So, it's usually very easy to find how to solve the problems about global warming.
Many people use spray. Shave cream, hair spray, deodorant, and so on.. have Freon gas in it. Freon gas makes the atmosphere break. It's possible to be made hole i the OZONE and heat the earth.
Also, we should invent efficient hybrid car. The fuel gasoline car makes the air dirty and be heated up. Recently, there are some hybrid cars in some countries, but the efficiency of the hybrid car is not enough to attract customers to buy it.
That's why we should invent high- efficient hybrid car.
Using air conditioner is also one of the reason of global warming. The air conditioner exhausts hot air to the air. Recently, many houses use air conditioner even though it's not pretty hot in summer, and lots of houses hue it for a whole day.. It's not only waste of electricity but making atmosphere hot. We should reduce the time to use air conditioner in household.
Using public transportation is good way to commute everyday. We can make the air and atmosphere safe , not to be heated.
There are a lot of ways to keep the earth safe and clear to live.
Our duty is very simple. We should leave good nature to live for our descendant. It's not difficult but many people pay no regard to nature. We should care about our future!
The global average air temperature near the Earth's surface rose 0.74+-0.18 degrees Celsius during the last 100 years. The Intergovernmental Panel on Climate Change (IPCC) concludes, " Most of the observed increase in globally averaged temperatures since the mid-20Th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations" via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-indusrtial times to 1950 and a small cooling effect from 1950 onward.
These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. However, a few individual scientists disagree with some of the main conclusions of the IPCC.
Causes
Earth's climate changes in response to external forcing, including variations in its orbit around the sun(orbit forcing) volcanic eruption, and atmospheric greenhouse gas concentrations. The detailed causes of the resent warming remain an active field of research, but the scientific consensus identifies elevated levels of greenhouse gases due to human activity as the main influence. This attribution is clearest for the most recent 50 years, for which the most detailed data are available.
In contrast to the scientific consensus that resent warming is mainly attributable to elevated levels of greenhouse gases, other hypotheses have been suggested to explain the observed increase in mean global temperature. One such hypothesis proposes that warming may be the result of variation in solar activity.
To solve these problems..
There are lots of reasons of global warming but many reasons are in our life. So, it's usually very easy to find how to solve the problems about global warming.
Many people use spray. Shave cream, hair spray, deodorant, and so on.. have Freon gas in it. Freon gas makes the atmosphere break. It's possible to be made hole i the OZONE and heat the earth.
Also, we should invent efficient hybrid car. The fuel gasoline car makes the air dirty and be heated up. Recently, there are some hybrid cars in some countries, but the efficiency of the hybrid car is not enough to attract customers to buy it.
That's why we should invent high- efficient hybrid car.
Using air conditioner is also one of the reason of global warming. The air conditioner exhausts hot air to the air. Recently, many houses use air conditioner even though it's not pretty hot in summer, and lots of houses hue it for a whole day.. It's not only waste of electricity but making atmosphere hot. We should reduce the time to use air conditioner in household.
Using public transportation is good way to commute everyday. We can make the air and atmosphere safe , not to be heated.
There are a lot of ways to keep the earth safe and clear to live.
Our duty is very simple. We should leave good nature to live for our descendant. It's not difficult but many people pay no regard to nature. We should care about our future!
