In terms of long-term temperature increases in the atmosphere, which of the following is TRUE?
A) Average global temperature has risen 5.0°C in the last 100 years.
B) No changes have been observed in the 21st century.
C) The greenhouse effect has never been shown to be real.
D) Increases in greenhouse gases have been observed.
E) It appears that we can readily curb the carbon dioxide problem.

Question

Quizplus · Accepted Answer

Increases in greenhouse gases, such as carbon dioxide, have been observed and are known to contribute to long-term temperature increases in the atmosphere. Option A is false as according to IPCC reports, the global temperature has increased by approximately 1°C since the preindustrial era. Option B is false as global temperatures have continued to rise in the 21st century. Option C is false as the greenhouse effect has been well-established by scientific research. Option E is false as curbing the carbon dioxide problem requires significant and sustained efforts on a global scale.

In Terms of Long-Term Temperature Increases in the Atmosphere, Which