What is the main cause for global average surface temperature rising since the mid-20th century?
A: Human activities;
B: Natural disaster;
C: Crustal movement;
D: Earth surface chemical weathering.
A: Human activities;
B: Natural disaster;
C: Crustal movement;
D: Earth surface chemical weathering.
举一反三
- According to the report, the rise of the earth's average surface temperature is attributed to some natural reasons.
- Global warming refers to the increase in the average temperature of the earth's near surface air and oceans in recent decades and its projected continuation.
- S3. If the temperature at the earth’s surface is 20F, the temperature in a coal mine 500 feet below the surface would be _____________________.
- The main function of a industrial system is A: Promote the circulation of substance, energy and value in the industrial system B: Converting natural resources into services or products that meet specific human needs C: Affecting the natural surface environment system D: Affecting the spatial distribution of matter and energy on the earth's surface
- _____ is covered with heavy snow. A: The earth’s surface B: The surface of earth C: The surface earth D: The earth surface