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Where greenhouse occurs what it is the origin?
There have always been greenhouse gases keeping the planet comfortable for life. They are part of the water cycle and the carbon cycle. Greenhouse gases hold back some of the sun's heat to keep the planet from freezing.The greenhouse effect that scientists are worried about now is the enhanced, or accelerated greenhouse effect, which has been warming the planet steadily for the last 200 years, since man started burning fossil fuels (coal, oil and natural gas). Burning these releases extra carbon dioxide that has been stored away for millions of years in the coal and oil. This extra carbon dioxide is causing the present greenhouse effect.
Have the polar ice caps increased or decreased in size over the last 30-50 years?
40% according to Al Gore's documentary An Inconvenient Truth.
Has average sea level increased during the last 100 years?
Yes because of GHG (green house gasses) making holes in the Earth's atmosephere (or O-zone layer) allowing the sun's deadly rays through. This cause the ice caps up north and now south to melt. And when they start melting, the sea rises. It first happened very slowly but now getting faster. Brainycat12
What was the average temp in the last 50 years?
ya! definitely as we access so muvh of heat and co2 gas in the atmosphere. by doing so many experiaments and developements we are just increasing the pollution
Why have greenhouse gases levels increased in the atmosphere in the last 200 years?
200 years ago was the start of the Industrial Revolution, when we discovered that we could burn coal in steam engines to run machines. Since then we have been burning fossil fuels (coal, oil and natural gas) all over the world in industry, transport and domestic use. This has added carbon dioxide to the atmosphere that had been hidden away for 300 million years. The carbon cycle can remove part of this, but not all, and levels have been rising slowly from around 280 parts per million (ppm) to the present levels (2018) of more than 400 ppm.
Why world's population has increased rapidly in last hundred years and main problems will cause?
Why world's population has increased rapidly in last hundred years and main problems will cause?
How has the climate changed over the last 100 years?
The temperature has increased.
What allergy has increased dramatically in recent years?
Food ( as opposed to non food) allergies or intolerance has increased dramatically over the last twenty years.
How has the percentage of teenagers beeing anorexic changed in the last few years?
It has increased.
What has happened to resource consumption in the last several hundred years?
it has increased dramatically
What percentage has public transportation ridership increased in the last 6 years?
21%
Which livestock population has increased by the greatest percentage in the last 40 years?
chickens
Has violence increased in the last 5 years in the US?
Compare the last 5 years of the FBI Uniform Crime Report for some reported numbers.
What best describes global CO2 emissions?
The amount of CO2 released by humans has increased over the last 200 years. This increase is primarily due to using fossil fuels in industries and vehicles.
Why has tourism increased in the last 40 years?
It's getting easier! more popular!
Has the number of drunk driving fatalities increased or decreased in the last twenty-five years?
no
Why have average wages not increased substantially in the last 20 yeras?
The average wages has not increased substantially in the last 20 years because of politicians. It is up to the politicians to make the wages higher.
