If you look on openstudy.com they have lots of answers to this :-)
the most common land use is for farm land
Answer:
They cause climate change by trapping heat, and they also contribute to respiratory disease from smog and air pollution.
Explanation:
Extreme weather, food supply disruptions, and increased wildfires are other effects of climate change caused by greenhouse gases.
The answer is Greenland, there was a story were lot's of people lived on Iceland but Iceland was all green, this person found Greenland but it was covered in ice, he called it Greenland to make people come there.
The opening of the Panama Canal affected transportation because now, sailors didn't have to sail ALL the way around South America.