Please answer ASAP, I would like to double check my answer with someone Global warming is
A. a scientifically proven fact
B. caused by humans
C. disputed for political reasons
D. all of the above

Without stratospheric ozone, which of the following would most likely occur? i. smog over major cities would be greatly reduced. ii. farms would produce surplus crops because of increased photosynthesis. iii. uv radiation would damage phytoplankton and reduce populations of aquatic consumers. i only ii only iii only i and ii i and iii