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Green house gases.
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∙ 13y ago
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What is the most significant reason for the dramatic increase in life span over 100 years?
the invention of antibiotics and immunizations
When have comets been spotted over the last 100 years?
Typically, several comets are spotted every year.
When was the last time snow in mcallen Texas?
2004 was the first "white Christmas" recorded in McAllen in over 100 years
What gas has been increasing in the atmosphere for the last 100 years?
Carbon dioxide (CO2) has been increasing in the atmosphere for the last 100 years. It is primarily released through the burning of fossil fuels such as coal, oil, and gas, as well as deforestation and other land-use changes. This increase in CO2 concentrations is a major driver of climate change.
What is the atmospheric oxygen concentration on earth over the last 100 years as a function of time?
We don't have 100 years of data, but we do have 20 years of data, with data going back much farther through proxy data. We can create a pretty good guess back 100 years because we have records of CO2 since 1957, and better proxy records of CO2, which is strongly tied to oxygen.
How have the southwestern forests changed in the last 100 years?
they have dried up over the years
The main cause of death over last 100 years?
Death
How has the climate changed over the last 100 years?
The temperature has increased.
What are the changes in speed limits over the last 100 years?
Advances in technology
Why have CO2 levels in the atmosphere doubled over the last 100 years?
Burning fossil fuels. It took 100 million years to make them & we've burned about half in 100 years.
How have causes of death changed over the past 100 years?
causes of death have changed over the last 100 years due to many reasons, such as a more widespread recognition of illnesses
How many deaths have chimpanzees caused in th last 100 years?
over a thousand.
Will concrete last over 100 years?
Yes it will concrete gains strength as it ages
How has human height changed over the last 100 years?
People have gotten taller.
How many Olympic games have been held in the last 100 years?
OVER 9000!!!!!!!!~!!!~!~!~!
How many degrees do scientist expect the average global temperature to increase to over the next100 years?
i believe it would be 250 degrees over the next 100 years.
How has the arctic sea ice extent changed over time?
Over the last 100 years it has generally shrunk.
