One possible version: The earth is becoming warmer because of human activities, especially the burning of carbon fossil fuels. (要点 1 ) All scientists accept that the levels of carbon dioxide have increased. (要点2
It forms beneficial gases Climate change is the key criminal in the oper C. It reduces their living areas.ocean. Warming surface waters make it harder for oxygen to reach the inside of the ocean. Furthermore D. It produces more carbon dioxide.as the ocean as a whole gets warmer, it ...
carbon dioxide and methane primarily, in the earth's upper atmosphere directly caused by human burning of fossil fuels, industrial, farming, and deforestation activities. Global warming is defined as an increase in the average temperature of the earth's atmosphere (especially a sustained increase tha...
believe that we should not worry about high levels of carbon dioxide in the air . They predict that any warming will be mild with few bad environmental consequences . In fact ,Hambley states ,"More carbon dioxide is actually a positive thing .It will make plants growquicker; crop...
Pollution, particularly in the form of carbon dioxide gas causes the atmosphere of the Earth to warm. The warmer atmosphere means that energy is... Learn more about this topic: Ocean Pollution | Causes, Effects & Prevention from Chapter 5/ Lesson 6 ...
on the Mars now,some scientists think there may have been some form of life a long time ago.At that time,the planet had active volcanoes(火山); the atmosphere was thicker and warmer; and there was water.In fact,in some ways the Mars may have been similar to the Earth,where life ...
crops will produce morerit will encourage a greater ranges of an-imals-all of which will make life for human beings better."Greenhouse gases continue to build up in the atmosphere.Even if^ we start reducing the amount of carbon dioxide and other green-house gases, the clinate is going to...
At that time Mars would have been much warmer and wetter than it is today with an atmosphere composed mainly of carbon dioxide just like that of the earth at the time. Under these conditions it is highly probable that life may have arisen on Mars as well.But even if life did not arise...
Calculating the Mass of Spheres Isaac Newton showed that, for spherical objects, you can make the simplifying assumption that all of the object's mass is concentrated at the center of the sphere. In the case of our planet, the center of the sphere would be Earth's center. The following...
the earth would be about thirty-three degrees Celsius cooler than it is. So, we need those gases. The problem begins when we add hugequantities ofextra carbon dioxide into the atmosphere. It means that more heat energytendsto be trapped in the atmosphere causing the global temperature togo up...