Question

The greenhouse effect is?

something that has only occurred for the last 50 years.

a natural phenomenon that maintains Earth’s temperature range.

the result of the differences in the angle of the sun’s rays.

an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.

Answer 1

It's D

Answer 2

thanks

Answer 3

Welcome. That's what I put on E2020 and it counted it right.

Answer 4

Hey @emanij ,

\(\Large\tt\color{blue}{\bigstar Welcome~to~OpenStudy! \bigstar}\)

This is a link to merriam webster.com stating the definition of the greenhouse effect.

http://www.merriam-webster.com/dictionary/greenhouse%20effect

I also have another link describing the greenhouse effect and how it works. Through those links, you should get your answer :)

http://climatekids.nasa.gov/greenhouse-effect/