Which of the following choices describes the greenhouse effect

The greenhouse effect is heat trapped in the atmosphere, which causes an increase in the earth's temperature that it would not have without its atmosphere in the first place! This is what makes greenhouses ideal for harboring plant life.

The answer is c) people evacuated but almost all returned

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion