Superconductive materials are usually most effective

at very low temperatures
at very high temperatures
when a magnetic field is applied
under high pressures

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment.svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment.svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment.svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.

What is the problem in this article? what solution does the article propose?